Top 10 in order of gameplay.
1. Commodore VIC 20
2. Sega Saturn
3. Sega Genesis
4. Atari 2600
5. TurboGrafx-16
6. Sega Dreamcast
7. Nintendo Gamecube
8. PS2
9. Astrocade
10. NES
The VIC 20 has the simple aesthetics of the 2600 with the added bonus of making your own games in, like, 30 minutes. Any of you who know me know I'm the VIC guy.
The Saturn had incredible variety for international releases. By far, the most interesting console from a collector's view point.
The rest of the list is just fun. I can't believe so many of you didn't include the Astrocade. 3DO? Channel F? Seriously? I guess we all have our own tastes. If the list continued:
11. Vectrex
12. Atari 7800
13. SNES
14. GBA