Steam controller is fantastic, and unfortunately there’s really nothing else like it. I normally use a Logitech trackball, so the ability to use a touchpad like a trackball works well for me. I can’t think of any other controllers that use this instead of analog sticks.
I’ve actually stockpiled a few spares because I’m not sure what I would use as a replacement.
I theme mine on how I play them:
play with friends
play when I have a short amount of time
more in-depth games
completed
unlikely to play (e.g. parts of bundles)
And yes, a bunch of uncategorized