1st ed D&D in early 1980s. Ran Basic from 9yo. Then Traveller. Then Cthulhu blew my mind. Then Megatraveller, loads of Shadowrun, then so much Warhammer Fanstasy Roleplay... Always homebrewed all my games. Lots of self-made rules. Few years back some Trail of Cthulhu, and recently modern era Fate, and now Sci Fi Fate. And playing several D&D games, a session every several months.