I find it surprising how few people have mentioned looks. I like a character sheet that's easy to look at and that has a nifty design. Not some sort of crazy printer-killer, but something a bit more than boxes. Perhaps that's just me.

I like character sheets made by people who play the game. I mean, I know the designers play the game, but the character sheets in the backs of books always seem to lack something. Too little space fore equipment or spells. No place to track XP (*coughSWSEcough*), etc, etc. I like a sheet that has a place to track that thing that I always forget about, or ditches the useless boxes.