I find myself coming back to Rocket League over and over again. I love the fact that I can get in a match in just a few seconds, and matches can be done in just a few minutes. It makes getting in for a few matches a breeze, and it feels good since I didn't waste an entire day playing just a handful of matches.
What about you? What game do you default to when you have some spare time, or which game (or games) do you come back to time and time again?
Mine is also Rocket League. You can fit a couple matches into small windows of gaming opportunity. Even when I'm not REALLY playing Rocket League (like right now, when I only have access to my Switch), I still will pop on for a game or two because I have like 15 mins to kill.
When I have a big window of gaming ahead of me and there isn't a new release to hop into, I tend to default to Skyrim (+ a bajillion mods), Mount and Blade 2, or whichever Romance of the Three Kingdoms game I feel like most at the moment, usually 2, 7, or 8.