Whatever companies publish/republish nowadays as ROMs or that include ROMs. Plenty of homebrews, specially on Itchio, and some times (albeit rarely) we get stuff from companies like Capcom, Atari and Konami. It’s always nice when that happens.

For handhelds, I have a Supaboy, a PSP, a PS Vita, a 3DS old, a New 3DS XL and a Switch.
Out of those, the Switch is the only one I can’t play emulated games or homebrews, given I haven’t modded it nor there is flashcarts for it.
And among the ones we both have, the 3DS XL models seem like the best ones. Not very heavy while still being decently sized, good resolution and color palette, buttons with good pressure, and for emulating Nintendo games, Nintendo’s own devices are usually the best for their given release period.

Some years back, this might’ve been an alluring thought. But now, I think in the lines of “there isn’t a cure when there’s no disease”. If anything, more and more, I see new strengths to be explored in this “issue” that is autism (as well as it “sibling condition”, ADHD).

Mint 21.1 Xfce, and if Android counts, ArrowOS 13 (on phone) and BlissOS (on an old computer)