Well, I've beaten DMC4 already. I'm not really in the mood for Ratchet and Clank style gameplay. I'm in the middle of a stupid maze dungeon that I screwed up in Eternal Sonata. And I just can't really get into Folklore.
And trophies are just enough incentive, silly as they may be, to get me to replay a game I may not have been crazy about the first time around. I was really disappointed with GoWIII when I first played it, but working to plat it was fun. Perhaps I'll enjoy Lords of Shadow a bit more now that I'm less focused on the story.