I've been to DragonCon every year for the past 5 years in Atlanta. The first year was by far the best. They have changed things a bit, more and more of the actual convention is set up across at least 2 hotels. There's a big parade Sat. morning for all of the 501st and anyone else that is dressed up. There's gaming that lasts pretty much 24-7 for the entire time. Artwork, silent auctions, you name it, it is there. They have scaled down the size of the dealer's room, which I think has affected who attends these shows. Not much to buy anymore, but occasionally, you find good deals. Also, there's lots of vendors there explaining new games, or products. Lots of fun.
Buy your tickets early, it is cheaper.
I've also been to the Star Wars Celebrations, unbelievable. I'll try to dig up some pics and post here. Interesting people.
I think it is safe to say there's lots of guys out there in the world that do NOT need to wear costumes that involve tights!