As far as actual comic cons go (meaning "big dealer area" in my mind), Wizard World Chicago is a very large con. Their average attendance is around 60,000 people or so. By way of comparison (though a completely different type of con), Dragon Con gets around 40,000.
I'm down with a meet up if anyone else is
I'm gonna be hopefully going in my soon-to-be-completed Tron Legacy costume
And my gf is going as Babydoll from Sucker Punch, but the white and rhinestone get up
well when we went to Philly for that comic con, we went and saw a bunch of the filming locations for Rocky and saw Adrian's Grave. We went to Gino's and Pat's the famous cheesesteak places that are located right next to each other. stuff like that i guess.
I can't seem to find any good info on the official site regarding what to actually expect in terms of booths, items, dealers, etc... if you've never been to one of these before. Is this mostly just comic books and artists or will there be a nice selection of movie and videogame busts/statues/figures to shop for, too?
Another cool attraction is the alley where john dillinger died, well not interesting at all its just an alley. I actually saw the filming of that scene for public enemies. I'm thinking of going to the Con but probably not in costume since I have nothing at the moment.
I've been going since around 1990 with Jodokast3 long before it was a Wizard con. It's had it's ups and downs, but I enjoy it every year. Mind you I have never been to Dragon or SDCC so I can't compare. But I never miss it.