I was playing Alien Vendetta megawad in Chocolate Doom this morning. It's comfy, but gets really hard in the later levels though.
Otherwise it's mostly older roguelikes or other simple games. A lot of the more recent games don't run good on my hardware (it's an ARM SBC with Allwinner A20 SoC, i.e. dual-core 32-bit Cortex-A7 @ 1 GHz). But I don't care that those newer games don't work since my interest is old stuff, and I mostly just use emulators for 8 and 16 bit systems (computers and consoles).
Oh, I also found out there's a Chocolate Duke Nukem 3D. I built that and it runs mostly fine. There was a bug with the cranes not working in the warehouse level (the one where you leave the submarine) but it's not a big deal because you can strafe-jump to the ledge the crane would have dropped you on. So I played all the way to E2L3, where I found myself constantly running out of ammo and getting ganked by those exploding flying drones. So I kinda quit playing there, since it just wasn't fun. At some point I'll try again on a lower skill level, or maybe just cheat or skip that level or something. Anyway this engine doesn't work as good as Chocolate Doom for me. Turning with the keyboard is more jerky and less precise. And I don't own (or want) a mouse, so that's not even an option.
I also downloaded the Chocolate Keen port (handles Commander Keen 1-3), and the Reflection Keen port (Keen Dreams, Catacomb 3-D, Catacomb Adventure Series), but haven't tried to build those yet.