Besides SMS, ones that always fascinate me are the early (pre-PS1) CD consoles: Sega CD/Mega-CD, CD-i, TG-16, Neo Geo CD...
Same as earliest PC CD games, their games include such unique ideas on what to do with the huge amount of disc space developers suddenly had available.
Also that era has huge nostalgia for me, as that was the time just before WWW and all I knew about games and consoles (beyond the SMS I had) came from a handful of magazines I happened to have.