You read my mind. I was thinking about making one of these yesterday. 

Joe Dosie Doe- A boy (duh) with dark hair and circular glasses. I can picture your voice more than your appearance, actually. You sound very confident.

Gollum- A girl with red hair and square glasses. A cynical voice of a sort.

L- A female version of L from Death Note. A more "mature" cynical voice.

SC- A tall girl with long hair (blond?) and a cape. Light blue and made out of a light fabric, I believe. Usually standing on top of a large bluff. Commanding voice (that sounds like Saruman, doesn't it?)

Red- What Red looks like in real life. 

Daffodil- A girl's face in a daffodil. Does that sound strange? Slightly plaintive voice.

Blackberry- A hyper elf with fairy wings and black hair. Peppy voice.  

Blue Fairy- A blue fairy. Big surprise, right? A higher pitched version of Daffodil's voice.

Melody- A girl with long red hair. You seem very energetic and your voice reflects that.

Ima- A girl with dark purple hair. You have kind of a invigorating, warm voice.

Ivy- A girl with bubble-gum pink hair and green eyes (sorry, I have a character named Ivy and that's what she looks like). A purple sounding energetic voice.

Admins- Your voices sound patient and vaguely yellow-brown.

Blond Heroines Rule- A blond girl with freckles and hair in a ponytail, I think? Your voice souunds exceedingly warm yellow and very energetic and fun.

Theo- Your voice sounds quite brown. It's kind of patient but clever at the same time. I picture you as a brown-haired boy wearing a top hat and carrying a candle.

Lexi- Your voice sounds purpley pink and kind of shy and I picture you as a blond girl (what's up with all the blondes?) with kind of a shy grin.

TNO- A tall black-haired young woman. Your voice sounds knowledgeable and reminds me of fabric.

I know I'm forgetting people. Please remind me.

Ivy: I picture you as a tall (5'6), thin girl with straight long blonde hair and blue/green eyes. I think you're intelligent, confident, strong, and courageous, but also gentle and kind.

Theo/Lexi: Although you haven't made it clear whether you're a boy or girl, I still picture you as a boy. I think you have brown hair, dark and deep brown eyes and you're on the shorter side. I think you're creative, smart and funny.

Blonde Heroines Rule: I picture you as a girl with, well, blonde hair that is wavy. I think you have exquisite, bright blue eyes that sparkle when you smile. I think you're brave, bright, happy and creative.

Melody: I picture you as a girl with dark brown hair and green eyes with flecks of grey. I think you're clever, a bookworm (that's a good thing!), a Disney fan (okay, I know you are), and shy around new people.

Ruby: I picture you as a girl with glossy brown curly hair and brown eyes. I think you are friendly, happy and ... I'm not sure, I don't know you as well. 

Red: I picture you as a boy with spiky brown hair and blue eyes. I picture you as medium height. I think you're strong, energetic, sports fan and funny.

L: I picture you as a girl with dark brown hair that looks black and is often done in a side braid. I think you have intense green eyes. I think you are confident, funny, musical, and smart.

Blackberry: I picture you as a girl with short light brown hair with hazel eyes and freckles.  I think you're energetic, full of excitement and ready for anything that comes your way.

Daffodil: I picture you as a girl with blonde hair and cute glasses that bring out the color in your blue eyes. I picture you always smiling. I think you're creative, smart, strong and kind.

Joe Dosie Doe: I picture you as a boy with longer (2-3 inches) brown hair and dark brown eyes. I see you as daring, smart, creative, and always ready to try something new.

Gollum: I picture you as a girl with short black hair and hazel eyes with glasses. I think you're unique, kind, bright and a bookworm (a good thing).

SC: I picture you as a girl with blonde hair and green eyes with freckles. I think your smart, courageous and creative.

Emma: I picture you with black hair and dark eyes with red lips. I really don't know you well because you're newer, so I can't say any personalities yet.

Blue Fairy: I picture you as a young girl with blonde hair and exquisite blue eyes. I picture your hair in two braids. I think you're sweet, kind, creative and sometimes daring.

Ima: I picture you as an older girl with silky blonde hair and green eyes. I picture you as helpful, intelligent and kind.

TNO: I picture you as a older girl with short black hair and dark eyes. I picture you as musical and courageous.

True: I picture you as a girl with brown hair and hazel eyes. I picture you as helping your siblings, having a sweet temper and as kind and gentle. 

Butterfly: I picture you as a girl with blonde hair and brown eyes. I picture you as energetic and kind.

Violet: I picture you as a girl with black hair and violet eyes. I think you're an artist, writer, creative, happy and create fun new ideas.

Everinne: I picture you as a girl with long, flowy blonde hair and blue eyes that glimmer with a secret. I think you're kind and love the outdoors. 

Maggie: I picture you as a girl with wavy black hair and brown eyes. I think you're brave and confident.

Elizabeth: I picture you as a girl with wavy blonde hair and sparking blue eyes. I think you're good at giving advice, friendly and creative.

I feel like I'm missing people, but I believe I have all of the regular Chatterboxers. Who am I missing? 

Some of my descriptions at last:

Blonde Heroines Rule: Very soft and playful 14-year-old girl, light, sparkly blue eyes, loose, long blonde hair, freckles, thin build, wears shirts with peace symbols and one of those shorts that are shorter than shorts I always see girls wear, sweet, playful voice, looks kinda like a hippie...

Theo/Lexi/Theo: I think this genderless user is a boy. Brown hair, cool smile, about 5 feet tall, sunglasses, a really coolish dude who wears robot T-shirts and such, always drawing cool stuff, has a lot of video games, and is rarely seen without a pen and paper to draw with.

Gollum: A very serious brown-haired girl who rarely smiles and is very plain, simple, and smart. 4' 5" tall, wears sneakers and jeans, and is generally buried in a book.

I'll post more later.

@ Theresa:

Reminds me of Eowyn (Miranda Otto) from the Lord of the Rings movies, and that's the best compliment I could ever get. Thank you!!!

As for the others:

Ivy: Fairly small, with black hair and a sweet smile.

Gollum: Also small, with secretive eyes and a Gollumish voice.

Blonde Heroines Rule: Really perky and blonde, with blue eyes and a cheerful personality.

Red: A guy in a red shirt.

Joe Dosie Doe: No offense here, but I always picture you as an very average Joe, who does a good bit of square dancing.

Theresa: A St. Theresa, kneeling and praying.

Elizabeth: Soft brown hair, soft brown eyes, very quiet and likes to read.

TNO: Black hair, fashionable glasses, very intellectual.

Blackberry E.: Tall, with short hair, dark eyes and a rather woodland look.

That's all I got for now.

I fail at this, as words are people who I've never seen, but I'll give it a shot.

Teresa, that is accurate enough for me. I do have brown hair, and try to keep my temper, but I like to help my sisters.

Butterfly doesn't have blonde hair, but does have brown eyes, like me. She is pretty energetic and kind.

Ivy: Wavy black hair and a green ribbon tied as a headband. Blue eyes and pale skin.

Theo/Lexi: As Theo, you are a boy with round glasses and brown hair. As Lexi, you're a pixie with pale skin and short blue hair, wearing a red dress.

Blonde Heroines Rule: I actually picture you as Katy in What Katy Did. I just finished the book, and I thin of you exactly like her.

Melody:A girl who has short black hair and wire rimmed glasses, playing a violin.

Blue Fairy: A fairy on a pink daisy with a blue dress on. The rest is fuzzy.

Ruby: A girl with very pale skin and black hair. 

Red: Spiky black hair, blue eyes, pikachu T-shirt.

L:*Cough* I know that you are a girl, but imagine you as Errol.

Blackberry:Wavy brown hair, light skin, brown eyes, standing next to a blackberry bush.

Emma: I don't really know you yet, but I thin as Susan The Chronicals of Narnia.

Daffodil:A white T-shirt, blonde hair, blue eyes, no glasses, light skin.

Joe Dosie Doe: Brown hair, tall boy at the computer, punching arm in the air. Glasses.

SC: A dragon with blue rimmed around it.

Ima: A older girl, tall, straight brown hair, reading a book on a cozy looking couch.

TNO: A smart, older girl with copper coulored hair.

Violet: A shy girl with brown hair that's in pigtails.

Everinne: A girl fencing.

Elizabeth: Blonde hair in a thick braid. Kind and generous.