Hi Taff,
Have to agree with EESDL in that the OTC doesn't really give you the best impression of what life is like in the RN as an officer - it just shows that you're keen and have already explored the possibility of joining the military.
Having been in the careers service I was never that keen on pushing the RNR route either.
The AIB will obviously look at the fact you have been before and they will be looking for improvement - however, they will be much more interested in the fact that you have made efforts to improve (your work at the airport is ideal).
As for the flying lessons - Save the cash and go on holiday fella! It really has no bearing on the way the AIB will look at you and it is of little use through flying training.
Hope all goes well
AL
PS 'Subtle nuances of being a Naval Officer'
Don't think I have any subtle nuances! If I did have I'd like to think I'd have been told at my last medical...