In no particular order:
Spec Ops: The Line
Borderlands 2
Dishonored
The Walking Dead
Binary Domain
Sleeping Dogs
Those are some of my nominees.
My worst games:
AMY: Had a lot of potential but just ruined it.
Anna: Made me feel physically sick (And not in the nice 'Spec ops: The Line' way). Mostly because of its stupid artistic pretensions, 90s era graphics, insane puzzles and the fact you have to create an account with their developer to play it. I mean, really, are their egos that large?
Resident Evil 6: The game reminds me of a Michael Bay film: All colour and flash and big guns without any respite or substance. To paraphrase Yahtzee, that all becomes boring when not juxtaposed against the occasional quiet moment.