If I had multiple lives, I'd like to do many things, including being a homicide investigator. I'm not brave enough to chase people and draw down on them. Having spent time with that, it can be an incredibly terrifying job.
To my way of thinking, whether it's a superhero movie or a romance or a comedy or whatever, the most important thing is you've got to care about the characters. You've got to understand the characters and you've got to be interested. If the characters are interesting, you're half-way home.