Look I know I'm not the only one who feels this way but this is still my truth: EverQuest. Old EverQuest. I'm not gonna compare mechanics, visual quality, UI friendliness, customizability, etc because there are others that do it all better. EQ was brutal, it had a steep learning curve, it took forever to level, to quest, to raid, etc. But my goodness, the sense of accomplishment when you got REALLY skilled at your class, the vibe of having a good group going, the feel I got camping out next to the fire place near the gate in West Freeport, knowing that I was leaving the game but the world was still sitting there running without me, even the experience of recovering from a full team wipe... I know some of it is the nostalgia of the time I was playing it when I could spend all day every day leveling up (yes I'm in P99 now and I LOVE it), but nothing has come close.