If you're staying in the mob, then fast jet QWI has to be more fun than fast jet QFI. If you're leaving to go civvie, take it from me, no one gives a toss what Q you had. At my employer, whether or not you would be pleasant company on a night Tenerife counts for more than most of the CV items.
I filled out my CFS application under duress, in the bosses office (after binning a few), and put 'non volunteer' in red top and bottom, back and front. I think they got the hint, because I didn't go to CFS!
However, I did become a TWU TI (again non volunteer, I just wanted to stay on the front line), but the cunning plan fell apart when I was short toured just before my QWI course started.
A quick look around the TREs (sim and line training captains) at my present company, who are very pro ex RAF, shows not a single QFI or QWI. We havn't got any TPs either, but I would endorse that as an interesting route to follow, and with more cred outside.
To underline the differences between mil and civvie, in the RAF I was only interested in flying. Outside I also genuinely get satisfaction from instructing and examining, and am now a TRE and TRI(E) doing everything from line training new pilots to teaching and examining new instrutors on the A320.
As there is an ever present risk of being misunderstood on PPRuNe, let me be quite clear that I am not getting at QFIs or QWIs, but neither counts for much outside.
Apologies for intruding on the mil forum, but even 12 years after leaving, and with absolutely no regrets, I still find the quality of debate and banter in this forum far exceeds the drivel on the others.
So just remember, you can always tell a harrier pilot, but you can't tell him much.