"UAV" has stronger military connotations for me. I'm not sure it's inherently better. Maybe something entirely new is better? "AAV" Autonomous Ariel Vehicle, or something similar?
For what it’s worth, at NASA the official term is (s)UAS, but we use that and UAV, drone, etc interchangeably has in day to day conversation. As long as it’s clear what you’re talking about, the exact word is really not that important.