I dont understand your request.
Here's what I think he's saying:
"We have numerous toons, most with bios. Don't come in here and post your best, and only toon's bio. Or, don't come in and just post all of your toon's bios all at once."
It seems like he wants to know what your bio is for the toon you're playing at this very instance. Whether you just logged off of him/her, or you're getting ready to jump on them, show the bio.
What he said!
oh.
Well I dont have any particular character I play for the night. I switch out constantly. All teh chars in my sig I play at least twice a week 
In fact I need to add Mr Disco to that list but I dont think I have room. :/
That's fine. The whole point is that it's not supposed to be any particular character of yours like a favorite or a main. As a matter of fact, quite the contrary. It's supposed to be the one you happen to be playing right when you alt-tab over and see the the thread.
If you're not playing at the moment, it could be the next one you happen to load.
Random immediacy, you see.
http://xs70.xs.to/pics/06094/BestBioEver.JPG
My bio kicks your bio's [censored].
Awesomest bio ever! I felt chills.
Sounds interesting.
Just logged off with: Trillium
And rolled this guy up yesterday: The Cosmic Wasp
Both were spur of the moment, so they might need some touching up. They're part of an ongoing story of mine about some "classic" superheroes/villains...hence the tags at the bottom of each bio 
.
I see you're a fan of the pulp era.
I like the way you set up those shots, by the way.
A lot of us have mains and alts with perfectly polished bios posted somewhere outside the game for the interested. But, let's get realistic for a sec - the bio people see is the bio we have in the game, and the one for the guy you're on right now at that.
So, I thought it would be fun if people posted screenshots of the in-game bios for the characters they currently happen to be on. How is it everyone sees you at the moment?
Here's mine: Mustang Mecha