I'm in about the same boat, though it's not only because I like my 360 better in general.
My PS3 (and Wii) gets next to no game time because the games I generally want to play are on my 360. Games I like generally tend to be better on the 360 and those that are the same I generally choose 360 because I like achievements better or my friends play on the 360. There are of course some multiplat games that I bought for the PS3 (FFXIII, Blur because I could get it for $9.99 new, Batman, and Dead Space) but in general I just don't think of the PS3 when I think of multiplat games.
As far as the exclusives go, meh. The PS3 has some great games like Uncharted but the other ones just haven't excited me much. I tried Mod Nation Racers and it pissed me off, I despise MGS, inFamous bores me as do most sand box games, and I might try God of War 3 eventually, just in no hurry.
In general my PS3 tends to get more media time (Netflix, movies, ect) that game time. Though the only reason I'm using Netflix on my PS3 is because the quality on my 360 is pretty inconsistent for some reason. I'll put up with the lag on the commands and the disc for the PS3 if it means I can actually watch an entire show in HD.
Anyways, what was my point?
Oh! You're not the only one. :-p
It's not that I don't like my PS3 for gaming, I just don't like it as much as my 360 so the PS3 generally doesn't get the multiplat games and the PS3 exclusives don't interest me as much as other games.