My favs: (not including handhelds, if I did, there would be a few in this list.)

1. NES
2. SNES
3. Genesis
4. Turbo Graphx 16/ Turbo Duo
5. PS1
6. Wii
7. Dreamcast
8. N64
9. Gamecube
10. Saturn

11. Xbox 360

A couple of current gen systems in my list. Wii moved into my top 10 pretty quick, and the 360 Iam sure will break into the top 10 soon enough.