FM Towns Marty 2! A rare console that gets no attention. I never knew it even existed until I got into emulation a few months ago. I'd like to play PuLiRuLa on it.
Also, Atari Jaguar. I remember when it first came out and was awed hearing that it was the first 64-bit (questionable by some) console. It was so much more expensive than all other consoles and I felt bad asking my parents to buy me something so pricey (new console plus a few games & accessories would had been easily $500 right off the bat). Plus nobody I knew ever owned one. So I always wanted to see it in action and play it. But before I knew it, they stopped selling it. It had such a short life span. So I always felt bad for it.