I guess my reaction to the second debate is similar to my reaction to the first. Trump impersonates a wonk pretty well. He is good at coming out with facts that sound impressive, whether true or not. Hillary was not good enough at calling him out when he spouted nonsense. His behavior was more restrained this time, i.e., he did not make obviously clownish faces and the like. I actually thought he had a good point when he pointed out that there are no good guys in the Syrian civil war, and that arming rebels is not a good idea, given what they turn out to be. Very true!
Still wouldn't make me trust him with the Presidency, though.