It sounds dumb but my pick would be the SNES. There's just something about 16 bit games I love.

The SNES has so many good games, like sf2. The first party games and some good arcade ports.

It also has a lot of good RPGs, like chrono trigger

The controller is really cute

Tho, the PSP is a close second. Tekken dr running at 3x resolution looks beautiful

Yes I'm a sucker for dpad centric devices. Yes i love emulation.

16 bit stuff looks amazing