My wife bought a PS3 because she likes spending her money on frivolous shit and it seems alright, it's also a decent blu-ray player and the movie rental selection on the playstation store is pretty good. Some of the downloadable games on the store are really fun too, getting high and drinking while playing
Echochrome is a favorite after-work activity among me my buddies right now. I personally like the types of games exclusive to the PS3 like MGS4 and LittleBigPlanet. Xbox didn't really have anything on it that appealed to me, I can pirate all the neat games like Bioshock and MassEffect on the PC and I don't care about Halo.
I think that the PS3 is a more interesting piece of hardware and feels a little more like a multimedia center than just a game console. It's also a lot easier and cheaper to upgrade/swap harddrives, you can get a 320GB drive in there for less than you'd pay for a 120GB Xbox drive.