I guess you're happy if you have some kind of balance in you. I'm a human being. I have days when I feel paralyzed, days when I feel like a slug. Then I have days when I have good energy, I've read the newspaper and I've done different things.
It's actually meditative to sit in a character for an extended period of time, realizing what your relationship is to who you're playing and then letting go, just being there.