If you interview people or friends who work with me, they would say I'm private or internal or don't emote a lot. Yet I do it every day for 10 million people. I just don't do it for the 30 people I'm in the room with.
I really have no ulterior motive in taking on certain roles. I have no larger issue that I really want to show people. I'm an actor, that's all. I just do what I do.
When I start working on a batch of tunes - like roughly 10 solid tunes - I always know there'll be another 10 to follow, because for every song I invest a lot of time in, there's another song waiting behind it.