Just wanted to add that even though I was chopped I have no regrets about joining and trying (only regret I couldn't be more sensible at 19!)
The leadership training is world-class and AAITC shows you the edge of your personal envelope, and the warning signs when you are getting close to that edge that stay with you for the rest of your life.
The 120 hours I have in the back (and a few in the front) of a Wessex has given me airmanship and flying discipline that are still there now I have revalidated my PPL all these years later.
So Amnesia, go for it, if you get through you will have a great career, if you don't the experience will be as valuable as any uni course, except you get paid more and the girls love a gro-bag