Originally Posted by
cafecito820
I'm going to go against the grain here and say that if you're really concerned about efficiency with leveling and gearing, getting flying is going to be the single best investment of time you can make. It's a grind, no doubt, but once you have it, the amount of time you save doing world quests, completing quest zones (especially Suramar), farming herbs/ore, or traveling to Mythic dungeons is well worth it.
If you're at all close to getting the reputations completed on one of your other characters, I'd really urge you to just bang out the grind and unlock flying. You'll be very happy you did, I promise.