IPAs and all of the other craft beer stuff coming out, I couldn't tell you. There is some kind of brewer's science behind it, but I think most craft beers taste like overhopped garbage and I don't understand the appeal.
A lot of it is. They come out just as hop water with no balance.
IPA's are supposed to be extra hoppy though. They learned that hops act as a natural preservative, so the beers that were on the slow boat to India were hopped with extra hops so it didn't go bad on the voyage ... or at least that the story of how they got their name.
There are a lot of craft beers coming out in all kinds of different styles. A lot of breweries really miss with their IPA attempts in my opinion, but they are doing really cool stuff with other brews. Flying Dog has a rum barrel porter. Basically just a porter but aged in a rum barrel so it absorbs some of that flavor from the barrel.
Sours are getting kind of popular right now. It seems to be a love it or hate it proposition with those.
Saisons are starting to come back as well.
I agree that a lot of it isn't that great, but I do find it interesting to see what people are trying.