To eagerbeaver and the others - GO FOR IT!
If you don't you will spend years doing the "I wonder.............." bit. It costs nothing at all to apply, even the selection process is good fun, and although the Officer training is 'kin hard work, and may seem pointless at the time it is:
a) still good fun and b) excellent training for life the universe and everything.
One thing you realise when you leave the military is how un-reliable most companies and organisations in civillian life are.
If you bomb out of the flying training (chop rates are quite high!) you can still apply for the civvies as I know plenty of people who have.
But, if you have any doubt at all about the idea of being sent into combat then forget it. There is plenty of risk in the military aviation world (especially the so called fast jet world) and UN/NATO work puts you in the sights of plenty of people who would love to take a shot at you - and there is the IRA to think about too.
However, if you think you can deal with that, give it a bash - what have you got to lose?