Forever DM that has been running games for 20+ years and been playing since the AD&D 2nd edition days.
While D&D in its various incarnations is the easy go-to I also love running/playing with other systems (Apoc World, Forged in the Dark, Shadowrun, World of Darkness, etc.).
Helped a smidge with Roll20 in the earlier days (and wrote another VTT that eventually merged its userbase into Roll20) https://wiki.roll20.net/Acknowledgements.