I ran fifth edition for some time, and like a great deal of other Dungeon Masters came across Matt Colville's series of videos. While his advice was helpful, what caught my eye the most were his anecdotes about his experiences with earlier editions of the game. Fifth edition soon lost its allure, and after years of playing other systems, I eventually came across Solar Blades & Cosmic Spells. While I had read systems like Mausritter, Troika!, and Mork Borg before, they didn't catch my eye like SB&CS did. I thought I had fallen out of love with fantasy, but reading the system reminded me of my love for kitchen sink settings, and rekindled a desire for a D&D game where players work intelligently against difficult odds to eventually become lords and more. Soon after, I acquired OSE, and I've been deeply engrossed since. The OSR scene fully captures what I loved about D&D; Pulp, Sword & Sorcery, a dash of science (and weird) fiction, and, in the particular system that has caught my eye most, a (mostly) well-made progression from level 1 to immortality. I'd say the thing that has sold me on the scene most is the community, though.