I don't like lifts and will walk up 20 flights of stairs if I have to. Crowded rooms make me uncomfortable, too, although I can sing to a stadium full of thousands of people no bother.
Becoming a father, I think it inevitably changes your perspective of life. I don't get nearly enough sleep. And the simplest things in life are completely satisfying. I find you don't have to do as much, like you don't go on as many outings.
Chemistry is not anything an executive producer or writer can orchestrate or plan; you just hope for it.