I've mostly been sticking to CS: GO and CS2 these days. I still jump into TF2 occasionally for nostalgia, but CS has always had that competitive edge that keeps me coming back. Lately, it's been more about improving my aim and loadout than casually playing. I used to mess with Starcraft 2, too, but I'd get wrecked in ranked, so that didn't last long.
One thing I started doing with CS2 is flipping some of the skins I've had sitting in my inventory forever. I managed to sell CS2 skins here and quickly turn a few into cash. It helped me fund some upcoming games, but it is, too.