I didn't do the forces thing, but left a well paid job at the age of 28 to take a sponsored place with a UK charter outfit.
Big gamble, 2 kids, house etc. It worked out for me. Cost me loads of cash even though I was sponsored but I did have a guaranteed job at the end of it. Still with the same company flying narrow/wide bodies.
Wouldn't say I was 'aerosexually oriented' but I do think you need to be totally focused to get through all the hoops.
As I say to everyone that meets me and tells me what an exciting job I have. 99% of the time its sheer boredom, 1% of the time its exciting but I have yet to find an easier or more enjoyable way of paying the mortgage. I also spend more time at home than I ever used.
All in all, I would say go for it.