I started a game of Fate this year and I'm pretty happy with it. It's less crunchy and tactical than D&D most of the time, but it handles social conflict and losing conflicts much better. And does other stuff I like.

I tried to get my old D&D group to play other games but it didn't go super well. In retrospect, there were game agnostic reasons why I didn't really gel with that group, so it's for the best I left. But I think converting people who only really play D&D and close relatives to something else is hard.