What you think is fake in your head comes off as not enough on camera, a lot of times. You almost have to overdo it, in this overly, sort of Broadway, large-gestures kind of way to come off as being realistic on camera. It's strange. You almost have to act really fake to come off looking real.
I feel like with acting it's not like you make a choice - it's kind of in you and you have to do it or you wouldn't be able to survive.