If flying is the important issue then there is only one choice, the RAF. I have friends in all 3 services and all have their own opinion, but the overwhelming concesus is that the RAF treats it's people better and that the flying (plenty of it) is generally better.
Mind you, these are just opinions. The NCO aircrew route in the AAC is an option, however, be very sure that this is what ou want to do before committing yourself.
Best of luck!
