Hands down, whinging about artists who "suck," either because you don't know how to listen to them or because you think it will build up your pathetic indie cred ratings to slam the music that people you desperately wish thought you were cool (but never will, mostly because you obsess about crap like this) happen to like.
Jesus H. Christ, people. Get a life. There's more good music being made than any of us has time to discover on our own. Talk about THAT for a change.