Honestly I don't know that I have a favorite edition of D&D: every single edition I've played (1E, 2E, 3E, Pathfinder, 5E) I've found to be tragically flawed in one way or another. A lot like that song with a catchy chorus but crappy verses.
I suppose the ones that are easier to house rule into something I want are 1E, 2E, and 5E, so if one of these were arbitrarily taken away, I'd just switch to another.