Sincere or Fake?

It occurs to me that 'regular' theater people are a bit over the top. I have noticed that while improvers can BE over the top, they are not when they are being themselves. I wonder if that is part of keeping it real, even in our own lives? The over the top- ness of stage actors comes off to me as being fake, but I find myself being the same way when surrounded by them.
It is a titch disconcerting.