I've never owned a Playstation. I did "rent" one for a couple weeks when I worked at Hollywood Video way back in like 1999. Conversely I have owned an Atari 2600, NES, SNES, XBOX and XBOX 360. I don't really consider myself a console gamer, as I primarily play on the computer (2600 was before my c-64 which changed my life, NES was an X-Mas gift which I never got any new games for, SNES was bought, used, during training in the Army for something to do, and never bought any new games for it after training was done...) but with the XBOX systems I did amass a small library for each system. Not huge - and more of the original XBOX (I worked at EB Games for a time and got big discounts / caught up in the hype around some games) - but I've enjoyed playing XBOX titles.
Now, there were a few Playstation exclusives I've always been sad about not getting to play. Lots of FF's back in the day, Parasite Eve, and more recently Heavy Rain, God of War, Uncharted... and Last of Us.
Maybe... maybe I'll look into pick up a PS3 at this point. Just to, you know, help send a message to Microsoft. And to support Sony's latest move.