Some other people mentioned KSP here, and that was definitely one I sunk a ton of time into. That and Factorio, both because it feels great to build something from scratch and solve some problems to expand it.
But TF2 is my most played game which I still play now, just because it's so easy to...
Subbed 100%. My problem is that dub actors almost never sound like they're talking naturally, and that the Japanese voices fit better for their characters.