Pinky,
Just an observation so please feel free to ignore it or simply shoot me down in flames if you wish. I should add that I have no experience of the RAF fixed-wing world.
I do however have some experience in the instructing world and have found that for some pilots it is best work at a level at which you are competent and therefore happy than to be working flat out all the time doing a job you think you like but is really better left to someone else!
Although I admire your determination to get to FJ if the 'system' thinks you are best suited to ME or RW you might be pleasently surprised to find that they are right.
Good luck, stay safe.
Wiz