The SNES, the amiga, the MSX2 and old 2D games for the PC, is where retro can be at it's best.
2D gameplay, refined.
I suppose the N64 and the PS1 can be considered retro, but this is really the worst place to be, with 3D models that look bad compared to the earlier 2D sprites, and worse, gameplay forced into a 3D mold that isn't ready for it yet.