I have, of course, something that can never be passed up on the PS2 and PS3: Ico and Shadow of the Colossus, as well as SMT: Nocturne (which stands as my favorite game ever). I also have inFamous and 2 (plus Festival of Blood, because Cole desperately needed the power to fly).
I used to have Demon's Souls and Skyrim, but the latter just quickly became too much of a mess to enjoy. I acquired the Journey Collector's Edition about eight hours ago, too.
And yourself?