I have been involved with roleplaying games since the age of 8 starting with 1st ed. D&D all the way through 5th edition with forays into the World of Darkness, Shadowrun, GURPS, Marvel Superheroes, Mutants and Masterminds, and a few others. The bulk of my experience is as a GM/SM/Storyteller what-have-you.
I lean more towards games with a ruleset to operate in while the games I run tend to be more epic in nature that thrive on well-developed characters that are played by those who care more about the story than about what neat new power they are going to get.
Despite the many years I have had behind the screen, I still consider my game mastering to be a work in progress. I constantly hone my skills in hopes of running a most entertaining game.