The bad boy: always more fun.
My dad was a football player - a soccer player - for Manchester United, and I loved playing football, but I also happened to be the guy in class who was pretty good at sight reading. My teacher gave me scripts, and I was very comfortable.
What you do is, you just do the gig, enjoy, get on with it, and treat the rest as horse doodle.
You don't particularly want to stay close to your ex-wife. Or why would she be your ex-wife?
Every actor has to love and loathe the character he plays.