I've been to Momocon in Atlanta twice. It was really fun the first time, but it's free, so the second time I went it was way crowded and the line to register wrapped all throughout the building, outside, and then back inside and through the building again. We were seriously in line for four hours. So it kinda sucked.
P:

Acciocon this year, in Orlando, was freaking awesome, and it was really neat because I was on staff because I knew the director. I got to stay for free, go to all of the events, and all kinds of stuff, and all I had to do in return was dress up like Sirius Black and look pretty. It was really fun, but Acciocon discontinued because the director moved.
;_;