Yeah, played just about all of the above. My son (yep, I'm old) got me into League, so that what I primarily play.
As far as addictive games that I feel like I "own" at, it would be:
Black Ops 2LeagueFar Cry 1 / 2 MultiplayerBF2
Just stumbled onto trackmania. (download finishing). Command&Conquer, Age of empires, a tiny bit of League, and I'm trying to get into Dwarf Fortress. Oh, and HedgeWars. (totally recommend it if you liked the Worms games)
Skyrim (insane number of mods I don't remember), Portal 2, Dwarf Fortress, Terreria, Civ V and GTA
Terraria, And Running Windows 3.1, DOS And Windows 95
GMod and CS GO.
tf2 and The Binding of Isaac
Diablo, GTA 5, and everything similar to Minecraft