I've had fun with Dreamcast games, I just wish there were more of them! I really like 8BitDo controllers for older games, some of them have a nice retro look to them.

The Steam Deck has been a big thing for me since it came out. I still only use it for about 30% of my gaming, but that's usually time that I couldn't have gamed otherwise. There's a lot of PC games that work well on it.

Definitely check out Lutris, it's a great option for old PC games. It even works with a lot of console emulators too, and gives you a pretty decent library to put your games in.