I've kept all my systems. I sold my N64 a few years ago to help fund my PS2 investment. A few months later, I realised how stupid that was. Luckily my brother had his own N64. The only thing I really miss are World Tour, Revenge, 2000, and No Mercy. I re-bought them, but it's not the same without the wrestlers I made and all the edits I made to the wrestlers. Plus all the high scores my ex-girlfriend and I had in the tag team matches... and to a lesser extent a couple of my friends. My ex used Raven a hell of a lot.
Damn, now I'm all nostalgic
I still have my NES, SNES, Genesis, PS2, and the re-bought 64. I also had my original DS stolen. That sucked. I wish I still had that.