You know those rip off movies that are just vulgar comedy and really poor acting? Movies like Scary Movie (although a couple of those are okay) and Epic Movie? I hate those so much. Yes, I will laugh occasionally, but I feel sick most of the way through, especially when they bring out the 'poop jokes' D:
Also, Avatar was shit, as already mentioned, and as a rabid fan of the series I have to sadly admit AvP2 sucked so bad... Predator 1 did too, but at least they had an excuse or two. I hope the new Alien movies don't ruin what Alien is all about or I will cry.
Twilight doesn't really need mentioning, it's obvious it's bad, but I may as well add to the total count of Twilight haters.