I think vanilla destiny was when the game was at its best! I will always miss #forever29 and the first queens wrath (though I was level 5 at the time :P)
I feel like the crucible was better then too, though it wasn't balanced, fusions and autos were the best weapons, now they are laughed at.
-
I think it's best in it's current state. I'm a day one player but I only have 310 hours played, which means I don't no life the game and just play it at a good pace so it doesn't get stale. I like being able to do crota, atheon, or Poe whenever I want. I don't have close to all the exotics so it's still a great game right now.