If you do one, (and you should) I'd strongly suggest doing the following:
1: LJ Cuts!
2: Keep it focused on how the games you've played (or books you read or what have you) have formed the way you play today. "I played D&D for a long time, and then I played Vampire, and then I played Shadowrun, and now I play l5R" for 6 paragraphs isn't particularly exciting.
So far everyone (all 3 of them!) have done these really well. I look forward to reading more, and I might get around to doing one myself.