I have always loved PlayStation from the first article I read about it's prototype in GamePro back in the 90's. I debated this PS3 vs XBOX360 heavily and I hated the original xbox.
I like PS3's ability to play BluRay discs as well as a second use of video game console. However, 360 offers better capabilities when you're playing with a group of friends.
I own a 360. I'll be buying a PS3 sometime. I've had my xbox 360 for a couple years now and I'm glad I got it. It was worth the money.
I think for role playing games the PS3 is going to have a better selection than 360.
You really need to know your game type before you purchase one. The graphics are identical on most games. Although the PS3 with the I believe IBM C6 chip is superior to the processor of the 360.
PS3 has had its share of mechanical issues just as the xbox has. It's like buying a car, you're opening yourself to the potential of breakage with either a Ford or Chevrolet.