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...