Overlooked systems

[VAMatt]

I think one could make a case for all Sega systems, aside from the core Genesis. All of them had some great games, but not of them performed particularly well. Sega CD, 32X, and Saturn are rarely mentioned at all. Dreamcast and Master System get a tiny bit of run on sites like this one. But, they were all significant in te development of gaming in the late 80's and throughout the 90's.