I have 2 copies of Skyrim vanilla. One on PS3 and one on Xbox360 that I got as part of the package when I bought it because I was afraid the PS3 would never release DLC's. If I had the computer to run it, I'd probably get the GOTY edition when it comes out so I can use mods.
One copy atm. That's enough for me. Was not really scared about the PS3 not getting the DLC's so didn't really see the need to buy it on another platform.
I like to know the motivations for asking such questions about my personal property, which is in itself a useless bit of information overall.
One may as well ask, what is your favorite flavor of Lucky Charms marshmallow.
That wouldn't be very relevant to this part of the forum though. The OP's question is relevant. If you don't feel comfortable answering his question then you don't need to.