More recently, Civ V on a medium difficulty is like Solitaire for me. You can just kind of go through the motions and enjoy building an empire.
I really feel this, in a weird way. I reaaally suck at RTS games, and I don't wanna know how bad I am at those extremely complex games. Not my cup of tea(sadly), but they're definitely interesting af and in my childhood I played a lot of Anno and Stronghold games, so I'd kinda love to check them out.