One of the best science fiction series imo.
I personally play games to blow of steam and relax from work/real life. It's why I've turned down chances to do anything competitively in games. Once you get into that, the goal isn't to have fun it's to win and earn a prize. Statistical analysis of matches, units, weapons, etc can be eye opening and show you a better way to play (maybe even the best way). But I enjoy figuring that out through my own trial and error, and using options that feel fun rather than ones that are the most effective.
Same goes for Mafia, it's just another game for me. I like trying out new things, going for crazy gambits/strats, and just seeing how I can have fun.