1. SegaSaturn - people need to play the japanese games. It's crazy good.
2. Dreamcast - it was so ahead of its time.
3. WiiU - there is so much to love (and to hate, fuck*ng Nintendo) about this hardware (all the cool comunity stuffs that are far better than PS or Xbox. And it's easy to hack to make it the ultimate Nintendo hardware, and Need for Speed is killing it).
4. Vita - Still my favorite portable. The oled screen, the d-pad (street fighter zero 3 players will love it), the look are so much better than anything else on the market and sharing games with PS3/PS4 is so cool.
5. 3do - aka the EA machine with Super Street Fighter 2 X. Plus it had great ports of Wing Commander 3, Flashback, Alone in the Dark and Niiiiiiiiggghht Trraaaap baby!
I had the GC for its 6 first months, i hated all of the very very very very fews games it had (Luigi was sh*t after Mario 64, and so short, i hated Smash, and Wave Racer + 1080 were boring as hell compared to the N64 versions).