Can't decide on an ordered top 10. Demon's Souls and Dark Souls are pretty much the gold standard for games this gen for me I think. So one of them would have to be up there at the top. One of those rare instances where a game manages to combine the best of gaming's old ways perfectly with fresh new ideas.
Mass Effect 1, Yakuza 4 and Valkyria Chronicles come close too, for very different reasons.
Oh and fuck The Elder Scrolls, those games are a mess.