That's why I'm not being very specific - I assume that anyone who wishes to knows who I am on here, OAA in particular, and I am mindful that they would prefer that the process remain a surprise.
I'm a PPL already so I expected to do well on the technical elements, however then to let myself down on the "soft" elements is so frustrating, but a very important lesson. It doesn't matter how good a pilot you are if you don't play nicely with others!
Advice I feel I can give without over-stepping the mark, and which is generic to all (knowing my specific growth areas won't really help anyone else):
Learn BA absolutely inside out, make sure that you can substantiate anything that you bring up at interview, and when they ask you to work as a team, they mean it!
That is all rather obvious, I know - yet I seem to have missed the finer points.