Although Mr. Hat is 10 - 15 years ahead of myself and from what I can tell most of the posters here, and is therefore well worth a listen, everyone is different.
I could think of nothing worse than working a trade (maybe AME/LAME but not plumbing etc.) sorry. It's not for me.
I was talking to a guy who transferred out of my degree at the end of our first year to do construction management he got one and a half semesters of subjects knocked off his degree from RPL. Not bad and a lot more than I expected!
So maybe the Aviation degree is more useful than we think? As has been said though any qualification is only useful if you are using it. If you get a teaching degree, work in aviation for 10 years and decide you are over it, you will have to do a decent bit of training to make use of that teaching degree.
I'm 10 - 15 years behind Mr. Hat, maybe I will come to his realisation but personally for me and at the current state of affairs I am happy with where I am.