My biggest complaint - having it in a Casino/Hotel combo. Walking through the Casino everyday to get food and go to the con was annoying because of all the smoking, and the smell was awful. I'm not a smoker, and having to inhale that crap everytime I walked through there was unpleasant. Not to mention our room wasn't that great.
Overall I had a great time. The lines have been punched to death already, so I won't go there.
Someone mentioned it before, but please mail badges to us before the con. @_@ THat would save so much time for everyone. Also, more cashiers/credit card machines.