Anyone can identify with those moments in life where circumstances or people inform us that we've strayed from the path of our better nature and intentions. We know what that's like, and we resist it - so as not to feel like we're bad people.
Being an actor, imitating to the point of inhabiting the lives of others, may simply be a way of continuing to do what I learned to do as a boy - to travel, mentally and physically.
I know people who prepare their roles in such a way that they technically look ahead and memorize their gestures, and then they stick to it. Those that are technically proficient enough can make it seem natural, but they do that and don't really take in what other people are doing.
Like most people I can be lazy, so it's nice to have a goal or deadline or reason to work out. I feel better when I get to exercise, or when I'm outdoors. I like to hike, swim and run, and I love to play soccer.