Yeah, I like GMod as well, the most fun I ever had was in that very game. But you don't even realize what CS:S coding could do. Time freeze, car drive on de_dust, flying, burning, freezing, invisibility, whatever you could imagine. And if it was managed well, you could get a whole new game client with a very unique playerbase within the existing game. You had to experience that to understand me. GMod was more like fun, CS:S was more like a funny competition, at that certain level of play. To my eyes, the original Source engine looks a lot better, even though it's from 2003 release, physics and textures are still a lot better than plastic walls and models of CS:GO. Just a point, I don't care about graphics. If you really wanted, you could become a top player in CS:S as well but as is said, they just skipped it and moved on to a new version which is very popular right now. But it doesn't mean it's better, popularity doesn't define quality. If you want a competitive environment only, sure go take CS:GO but if you want a game of everything, not just to try hard and grind to oblivion, CS:S would gift you so many happy days.