I start: Satisfactory - because having your production running 24/7 really makes this game even more enjoyable and satisfying. There are just docker container for the server out there.
What games do get better for you trough selfhosting the server?
Rust
Edit:
Check out AMP by cubecoders for an easy to deploy all-in-one game server hosting web interface.
I love it. It supports many of the games mentioned in the thread already.