I think Favors let the last two games get in his head with the foul trouble early. He looks like the neurotic type who will dwell on his short comings, and let it get to him. I think he was pissed about his defense on Brook Lopez, who is basically ungaurdable, and it got to him. No excuses for Favors, but it is probably something he will MOSTLY grow out of. He is probably always going to have some off games now and then, but even in an off game last night, he did still get 10 points, 14 rebounds and 3 blocks.
There were a few minutes last night right before Ty took him out that I thought he was engaged and playing hard, he had a couple dunks, rebounds, and was kind of leading the charge at the start of the comeback run in the 4th. That is the Favors we need to see for most of the game. Not the sulking one who shoots 25% from the floor, and gets lost on defense.