I applied for the RAF Reg two years ago and did a site visit; I knew some of the squadron I visited from guiding them out in the Alps.
Well worth the time doing so. Unfortunately an old running injury from time in the TA dismissed any chance of joining the regs (or TA again, come to that), but serving is an annoying itch I've never scratched properly.
Things I picked up (which included time in the TA, advice from the initial RAF interviews and physios at RAF Honington):
- Get lots of training in. It makes life easier and prevents injury.
- If you're going for an infantry role, continue training during the second and third phase of officer training (this is more applicable to the RAF, but I'm guessing it's similar at Sandhurst, in that the physical is eased off to give more time in the classroom).
- Swot up on current affairs and current/recent military operations.
- Have a target regiment / corps that you've researched and be super enthusiastic (including visits) - this is allowed to change.
- Get more training in.
I was all signed up to join the Navy as an officer, hopefully to be a heli pilot/ navigator but then realised that one day I may be asked to kill someone... I couldn't do that willfully.
I had to ask myself this seriously before joining the TA, as a vegetarian that dislikes violence (yes, the irony hasn't escaped me ). What it came down to was this:
Did I want to kill anyone? No.
Does the idea of killing someone repulse me? Yes.
Could I, if it had to be done or my life was under threat, kill someone? Yes.
But my opinion is very much that you need to be clear on this from the beginning.