I have myself a 64, WII, PS1, 2 and 3, and a PSP.
For sure the 64 and WII are fun, but I love sony... and I love the concept of the PSP, being able to take it anywhere and having great addictive gameplay, also being able to call my friends via skype on it is awesome. I love the fact I can also store all my music, videos pictures etc on it. So it's basically like a MP3, ULTIMATE GAMEBOY and portable DVD player all in 1. So PSP gets my vote.