I was at Fan Expo 2 days this year. Saturday and Sunday.
Saturday I was working at the Big B Comics booth and it was fun time. The booth was in a great location so it was a blast seeing all the people walk by. Plus Richard Comley was there signing posters and stuff for free. He is a really cool guy and I have met him before so I had the opportunity to hang out and talk to him during the day.
Sunday I covered the show for Comic Book Daily and I just walked the floor all day. I'm thinking next year I'll get a video camera and just stop and talk to random people. I think that would be cool.
I didn't buy much this year. I bought the Avengers 8 pack from the Hasbro booth, a Marvel Legends 2 pack with Nick Fury and Captain America ($15) and a G.I. Joe Retaliation hat.

I spent more than I wanted, but when I saw the hat I had to have it.