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
The Wii brought gaming to the general public in a way nothing else had. Like most modern Nintendo consoles it was under powered and gimmicky but the gimmick worked so well for people new to gaming, point at the TV or wiggle the controller as you would to do the thing in real life was a huge step to making an abstract concept make sense to people. For longer gaming sessions or more “serious” games the Wii controls were generally lacking but damn if Wii sports wasn’t good fun.