Hi all, I'm an old timer DM. I've started refereeing D&D in the late 80's with the BECMI rules and, since then , I never stopped loving and playing trpg's :)
I know very well all editions of D&D and I can DM effectively every one of the following ones: Becmi,rules cyclopedya, AD&D 1-2, 3.5, 4, 5, but i love the 5 edition the most from the late ones and rules cyclopedya and AD&D 2 ed for the older ones.
I'm not all D&D tho: i had long campaigns with MERP, Rolemaster classic, Hero system, Shadowrun, Buck Rogers ,Savage World, and lot of shorter ones with many systems.
To summarize: i can GM almost anything under the sun, and if I dont know it, i'll learn it!
My campaigns are not easy ones, because swords matter, but often words matter even more, and every action has a consequence. The characters are a part of the world, not THE world. Keep your friends close, but your enemies even closer...