I am very loyal to Nintendo. I have owned all their consoles since the NES, and I have owned most of their handhelds (I never had a GBA).
I wouldn't mind having another company's stuff, but I never get around to buying it. I'll probably get a PS2 when they are like $50, and I also want a PS3. I'm not sure if I would want a 360 though.
Add me on Xbox Live: TopCat8