My gamemaster experience (in alphabetical order):

- Call of Cthulhu (1890-era, mostly homebrew game system and featuring crossover horror material) - D&D (Catchall phrase for AD&D 2nd Edition and the current 3.5 Edition. Settings included the "Oldschool Big Three": Greyhawk, Forgotten Realms and -ahem- Dragonlance) - Shadowrun (1st and 2nd Edition) - Star Trek rpg (the old FASA system and more homebrew. Mostly Next Generation era) - Traveller (actually a homebrew using own universe and own system...so why did we call it "Traveller"? Beats me to this day) - Vampire the Masquerade (...don't ask. White Wolf was hot in the 90ies and I catered heavily to a teen mob).

Player experience: Too many rpg's to mention, but over the last 3 years, mostly D&D 3.5 Edition. Specifically, the Forgotten Realms Campaign Setting.