Long lasting styles for kegging

Hey homebrew friends -

I've been a beer lover and home brewer for a long time, but I've slowed down my consumption by a lot over the past few years, for health and other reasons. Now I have this sweet 5 tap keezer hanging out in my garage, and it's empty, which feels like a sin.

So, I'd love some opinions from folks who drink less. 1. What beers will stay tasty over a long period of time? 2. What do you guys keg that isn't beer?

Thanks!!