I can't beleive I'm gonna say this, but 360.
Normally I'm a Sony fanboy, had been since the PS1 but when I look at a system, I look at the games it has. I could care less about features, or graphics(Personally, I think people make too big of a deal on graphics)
Last year, I didn't bother with X Box. All the games I wanted to play just got ported over anyway(That just left like, three games that were exclusives: Shenume 2, Panzer Dragoon, and Mech Assult) plus, with all those problems I kept hearing about, that made me boycott it even more.
As of now, PS3 dosen't have any games that I wanna play on it. And, as far as I know no one's modded the thing yet. Really, the only PS3 Exclusive I wanna get is Folklore other then that, as it looks like there isn't a game I'd wanna play that'll just get ported over away.
I'm actually thinking about getting a 360 myself. I could care less about the online gameplay, I'm more of a solo gamer myself but there are a few games I wanna try on it.
I can see myself eventually owning both though but right now, the 360 seems more tempting to me.