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
Portable: my black Gameboy Advance SP, playing my original Gameboy games on it (Donkey Kong Country and pokemon Blue)
TV: this is gonna sound weird, but I absolutely love my PS5, it’s just so sleek and I love the controller haptics and finally having most games running at 60 fps. Again I mostly play older games on it, but a lot of them got PS5 updates like Death Stranding, Ghost of Tsushima, Horizon, Spider Man, Days Gone…