I have always favored Alliance quests lines and zones. Horde quests can be fun, don’t get me wrong. IMO Alliance quests are more in depth and tell more of a compelling story over all.
Drustvar is amazing and also my favorite zone now. I try to level my horde people and it’s just not the same experience, so only one of them has made it to 120, while I have 6 on alliance side at 120.