Well, vBulletin is annoying.
Actually, I'll change that to another question. How long are you going to use vBulletin? There are much better forum systems available. And guess what, they aren't so freaking aggravating to their users. Oh, and another thing, they're free (I swear there is a free version of IPB somewhere, and I'm not referring to invisionfree.com). Why do people think that just because you pay for something makes it any better?