Biggest thing: People to go with
No one I know likes them, so it sucks going to them with people bitching.
Also, I'm not big on...meeting celebrities. If I like their work, I have no interest in meeting them. I like the idea of them, but can't go to them often at all. Prefer comic conventions or toy shows just because of the variety.
Also, a lot of horror fans are....not my kind of people.