I've said before that this has been my favorite gen for gaming, and a lot of that has been thanks to PS3 exclusives, especially when they fall right in the gap inbetween good 3rd party releases. Out of all of my years gaming, never have I had such a chain of eagerly anticipating title after title like I have for this one. It seems like recently there's always a game I really want to play on the horizon, where in previous gens I just picked up whatever sounded good at the time when I was in the store, and rented everything else.
The PS3 started off weak on exclusives, but the last 2 years and especially more recently it's been like you can't even finish one AAA game before the next drops. Some of these aren't exclusive, but the chain of Uncharted 2, Batman AA, Demon's Souls, Dragon's Age Origins dropping near the end of last year, and then shortly after Heavy Rain, Dragon's Age Awakenings, Final Fantasy XIII, and God of War 3 all dropping within a month of eachother was probably the best stretch of gaming I've ever had.
As for upcoming exclusives, there are several that look good. Resistance 3, a new Twisted Metal, inFAMOUS 2, Last Guardian, Starhawk, Valkyria Chronicles 3 (I really hope it comes out eventually, with 2 being the PSP game), Final Fantasy Versus XIII, Final Fantasy XIV, DC Universe Online, Demon's Souls 2 (like E UK, I hope), Mod Nation Racers (possible pick up), and possibly Gran Turismo 5 (I say possibly because even tho I loved previous GT's, I just suck at the controls anymore...the demo made that clear lol). I'd say Killzone 3, but honestly, I still haven't picked up 2 yet, but I do plan on getting it eventually. All of that's just what comes to mind tho, I'm sure something huge will be announced at E3, or Tokyo later on that will get me hyped.
It's odd to think tho that most of the main reasons I bought a PS3 in the first place have already dropped, and I'm still finding new stuff I want. Even odder to think that I'm enjoying some of the new IP's more than I did the carry overs from last gens.