@khm the dreamcast is hard to beat but I really dig the stuff that was coming out on PCE/TG16
I haven't done a deep dive into the tech stack but the tg16 just Felt Different than the other sixteen-bit consoles at the time. I really liked it! The game catalog isn't wide but it's got a disproportionate amount of Cool Shit in it.
@khm you might find this interesting https://www.copetti.org/writings/consoles/pc-engine/