MTC vs AMC job satisfaction   

Haven't worked MTC but interviewed. Took another job because they seemed rigid, with too much ex-army attitudes.

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. 

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