NES - aged way too much. I don't think I really care about playing any game on there for more than 5 min.
N64/GC/Wii/WiiU - aged poorly or not a lot of games I like to begin with
Handhelds - they are decent, but never my favorite.
SNES and Switch are hard to pick, SNES has a bunch of games I like but I've also played them to death. Switch will be getting FE, SMT, and Bayo which are some of my favorite series. I guess I will pick SNES until those games are out.