Try Lakka. Better performance (especially on menus) and generally better UX than RetroPie or any other emulation frontend I've seen. Several common controllers,

Try Lakka. Better performance (especially on menus) and generally better UX than RetroPie or any other emulation frontend I've seen. Several common controllers, including (what I use) bluetooth PS3 controllers supported out of the box, with sane auto-mapping for all supported emulators (no more manually mapping controls unless you just like that kind of thing). Only tricky bit is that you have to have blessedly-pure ROMsets for automatic per-system playlist generation to work (it's hash-based), but that's a minor hurdle (and going through it will encourage you to clean up any "messy" sets you have, which isn't really a bad thing). There's a stickied post on their forum that'll give you the names of what you need. And you can always manually create playlists or launch individual ROMs, regardless. Not affiliated with it, just a big fan of what Retroarch/Lakka and related projects are doing for emulation.