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
If this is some kind of question like “you can only play this in your lifetime” I’d pick up a DSi XL or closely a 3DS, I enjoy the DS library more, so it would be a downgrade doing it there, unless things have changed since the last time I checked.
The reasons are simple, it has tons of great titles and many of them have a high replayability value.