For the most part hate them. I did enjoy Goldeneye, CoD2+4+WaW, Metroid Prime 3 (I know, I know, it's FPA), Half-Life and TF2.
Most others I don't really enjoy.
I will say that Killzone 2's production values are pretty cool, though the gamplay is pretty bland in my opinion.
I would cite regulation, but I know you will simply ignore it.