Character sheets are important if they are important to the game.  I find it nice to check out who is playing and what they're like and it has proven to be an easy reference point to help with fleshing out a post.  If there are going to be character sheets, simple is best.  If you're going to try and make me jump through a bunch of hoops with some complicated bullshit template or arbitrary pro/con crap then you can fuck right off.