Any shoot-em-ups. It's pretty absurd to buy a game that seems to not have changed much. For example, CoD. From what I've seen, it hasn't really changed much, yet people are so hyped about it?

Grand Theft Auto series. I swear, from the first one to the latest, it appears that you can do almost the same things. Sure, running over people and stuff seems pretty fun, but just being able to do the same things every new game is kinda lame.

Most sport games. They're just simulations of a game, right? I say you have the TV remote; use it properly. (Games like Wii Sports and such are good ones, though)

I'm quite a bit short, so I'll come back to add more to this list when I think of some.