MTC vs AMC job satisfaction   

Worked AMC several years. Hated it. Company thinks it's the greatest, which is why it made so many pilots so mad that they unionized. Union is worthless and powerless, takes your pay for nothing, because the Company is now so hostile to the pilots on account of the unio that they make sure the union either never wins, or that if they win something that they the Company take away something else so there's no net gain. 

In HEMS, more than any other phase of the industry, most of your job satisfaction comes with the base- a happy base with good maintenance supporting you in flying the contract.

AMC was last to get goggles and flying singles in my market when others had twins. I switched and got a big raise, a twin, IFR and goggles and the attitude when I left was that I had stabbed them in the back. 

I wanted NVGs because I'd spent a significant part of my 40 year career flying nights unaided (4000 hrs). Very comfortable with that but I had also been exposed to aided night in that period. Not a perfect solution and not without drawbacks, but very useful in most night flying if you respected and worked around the limits of the devices.

I would never work AMC again. You might love it. Really, it's all up to you. Good Luck. 

Anybody interested should visit a base or better yet a couple, three bases and talk to program pilots, mechs and the self loading baggage (medics, nurses).