I joined the RAF due to passion for aviation and it's military use; I had a great time in the Service. The only real downside (as a non-aircrew officer) was being expected to show in interest in oh-so-many peripheral non-aviation activites and the concerns of those who spend their time doing them. No-ones saying that rock apes, cooks & bottlewashers etc don't make an essential contribution to the projection of power, particularly in the expeditionary age. It's just great to come to a place in one's own time where the focus is purely on the aviation iself - where's the harm in that?!