ive only been to Ohayocon, but it was great. ive done a little research, and apperantly it is the 11th largest convention in the country..
it was cool to see all the cosplay, and all the shops. the dealer's room was bigger than a High School gym, and packed with vendors selling various shwag. im definitly going back next year, and maybe even to a few other cons.
unfortuatly, i will probably not venture far out of the state for one..
and everytime i hear otakon, i remember the part in MGS where he pi$$es his pants