Watch this segment from the tv show Overhaulin' - when they redid Amber Heard's vintage Mustang. Begining at :30 seconds in, Heard is pissy, petulant, abrasive and insulting. Watch her body language and gestures to everybody around her, flipping them off and being aggressive. Until she learns that she's on television, and then it's all smiles and mugging it up. 

Then watch at 1:15 when she physically assaullts both her father and Johnny Depp, like it's cute or okay because she's a pretty girl.

Just look at how she looks at Johnny, like she's saying "You'd better not say the wrong thing, mister."

That, my friends, is the real Amber Heard, on display for the whole world to see. That's what Johnny lived with. I'm just shocked that he took it as long as he did.