EP,
If you join the AAC as an Officer you will probably only get 1 possibly 2 flying tours. (Maybe AH). Stand by to then finish flying, unless you become a QHI
If you join through the ranks your chances of becoming a Pilot are slim. Long slow promotion.
That said the AAC is a good choice. However for really varied flying with a long career, I would suggest you try the FAA and go down the "Junglie" line.
Finally you can always join the RAF.
Look long and seriously at what you want from mil aviation.
Finally you'll find quite a bit of advice inbound some good some bad, sift it well!!
Good luck.