I have a DS Lite, PSP, the PS3, PS2, Gamecube, N64, Sega Genesis, and Super Nintendo. I want to get a Wii but my boyfriend has one and I play it all the time anyway, so I don't really have any incentive to warrant my own purchase.
To anyone thinking about buying a PS3, it really is a superb machine, and has some great games, but the shitty games outweigh the good games in large numbers. So I'd recommend waiting until the system gets some great 3rd party software, like Metal Gear Solid 4 and Final Fantasy XIII, which are exclusive to the PS3.
Oh, and unlike the thread starter I can't stand Microsoft/X-Box. Blu-Ray all the way.