If only getting into the reserves were that easy these days. With cuts across the board, going from AD to the reserves has been increasingly more difficult, and it doesn't look like it's getting any better. maybe in a few years it will be different, but as I approach that 10 year mark, the siren song of "just staying in" is becoming more and more enticing, despite lower job satisfaction.
Kvetch all you want, but let's consider the alternatives.
If you're having fun on active duty then that's what you should keep doing. Ideally you'd go to 20 without ever losing the smile on your face. It's quite possible that by the time you reach 20 you would rather go for 30 or even 40, and just keep taking it one obligation at a time.
Another choice would be making a leap into the unknown territory of finding a Reserve unit and perhaps competing for a billet. There are a lot of drawbacks to joining the Reserves and the National Guard, and some of the factors are outside of the servicemember's control.
Another choice would be resigning from active duty for the Reserves/Guard only to find that it's even worse than active duty, or that nobody wants you in their unit. At that point you'd have to make your own way in the civilian world, because you probably wouldn't be able to beg your way back on to active duty during a drawdown. However you can fall back on your military skills and eventually find your way.
A fourth choice would be to stay on active duty for a decade after the fun stops. You could clench your jaw, grit your teeth, and grimly get through the rest of career until you're eligible for a pension. Assuming, of course, that your attitude does not permanently impact your physical, mental, and social health. I'm sure your troops would regard you as a fun guy to serve with, too-- to say nothing of your family.
In my opinion, if you're miserable on active duty then the Reserves are a much better alternative than any of your other "choices". It might not be easy to join the Reserves, but it beats enduring the status quo.
Like I said, "fun" = "stay on active duty". But keep an eye on your options and stay flexible. I speak from considerable personal experience, later validated by my spouse, and you don't have to repeat my mistakes for the purposes of peer-review credibility.