Which games should I buy?

Duke Nukem Forever is a joke. Assassin's Creed is the same old thing, although if you follow the story it may be worth while to pick up. Gears of War 3 is looking pretty decent, but I wasn't satisfied with the last one so I'm not sure if it will be any better. Warhammer 40k Space Marine is looking pretty good. Elder Scrolls V: Skyrim is a definite. And not so sure about the other 3 but previous games were good from what I understand.