Great theatre is about challenging how we think and encouraging us to fantasize about a world we aspire to.
I don't have a preference between theatre and film; I like to do both. But I will say that there's something about theatre that is more nourishing and sustaining than film ever can be.
With theatre, you have to be ready for anything.
The bad things about theatre get balanced by the good things in film and vice versa. So to tell you the truth, I love it when I can go back and forth - it feeds different parts of you and exercises different muscles.