Fable 2 was superb imo, really hooked me in, I found gameplay really good and easy to use/understand, and I completed the campaign in less than a month, like twestern said, the ending is really good and clever, I liked how you could keep playing after it and do extra quests, I even helped one of my mates complete missions with the cool new multiplayed ability.
ive enjoyed Assasins Creed too, still not finished it though, lolz







