The best time to play WoW was from Vanilla right up until the end of Wrath. It's hard to describe what made it such a joy to play back then. Many people playing the game throughout the summers made it feel so warm and inviting. People lost RL relationships due to this, not only that but many people met, fell in love and I'd bet many are still together and perhaps even still playing the game... despite the games descending appeal as more and more single player features were introduced. Once the sense of wonder vanished during the games peak active player count the game started its slow decline into mediocrity. The community back then was kind, helpful, determined, you had the trouble makers sure but for the most part people put in the "extra" and worked together in groups to achieve their goals. It's hard to put these feels into language but playing it back then everyone knew they were playing something really really special.
So to answer your question YES. The community was great at a certain point and if you weren't playing WoW around this time you were really REALLY unlucky missing out on the games heart and soul.There was absolutely 100% nothing at all like it. Nothing came close and even today now as I write this still nothing has got anywhere close to what WoW was back then.