It's also my first Zenkaikon, but I've attended Anime Boston in 05, 06, 07, 11 and last year. Cosplayed as a state alchemist in 06 and the original Red Ranger the last two years, and again this year at Zenkaikon.
This will be my first Zenkaikon too! Gee should we start a club or something?? Not my first con I've been attending Otakon since 02, AUSA and Magfest, not that these things make this any less intimidating XD