Sly Cooper and the Thievius Raccoonus (the first of the three--I own the collection).
This was also the first game I Platinumed, since I got a PS3 as part of that Black Friday bundle and then promptly failed to play it all until break because of finals prep and stuff.
Next up will probably either be the other Sly games or Infamous, depending on which I play more often and if I pay better attention to the collectibles on this playthrough of Infamous and thus wouldn't have to run around with a map post-game trying to find them all.
I only go for platinums in games I really enjoy and are not that obnoxious or time consuming. I am at 99% on Infamous 1 but will never get it because I refuse to scour the city for 27 remaining blast shards. No thank you.
"Rely on the luck of the rabbit's foot if you must, just remember that it didn't work for the rabbit." PSN: pingpong_ching