I'd love to say Eternal Sonata, but it hasn't been released for PS3. I think it's gonna suck, but I know I'll love it. XD
For real this time:
Devil May Cry - I'd gotten bored with the button-masher genre a while ago. Then my friend lent it to me, and I got hooked onto it. It's not a mind-blowing game, but it was pretty fun. Bought Devil May Cry 4, figuring that it would be pretty mediocre in comparison; but it was fun too.
MGS4 - My friend would never shut up about how great this franchise was. It got some mad reviews, but I still never believed it. Then I decided to pick it up cause PS3 had nothing else to offer. Stealth was never really my kind of thing. And it still isn't. But MGS4 was a blast.
Final Fantasy X - I tended to stay away from Final Fantasy because the characters looked weird and I thought I'd get freaked out too much. Also cause I heard that RPGs had a thing for sappy love stories. Turns out RPGs would become my favorite genre and that I value these lame love stories a lot.