I haven't touched another game since I got Fallout 4 on PC. Just fell down the rabbithole with mods and being in awe of Sim Settlements 2.
Usually I'm big on Rimworld though, and can't recommend it enough. It's one of those games that didn't interest me at all?
Was really put off by the artstyle and all the reports making out it's a cannibalism/slavery simulator- but honestly it reminds me of Fallout 4. You can be a raider if you want to, you can build a settlement if you want to, you can do quests if you want to, you can get mods (or just use vanilla starting stories/dlcs) to focus on a specific race/theme
So if anyone's looking to spend thousands of hours in a game, def check out a playthrough and see if you like it.