I've been a professional actor now for 38 years. A long time. And it's wonderful to earn your living doing something that you love. To think people actually give you money for it!
If you already have a piece of music ingrained in your body, why would you not play it?
It means working harder to do the research but I don't really mind - I don't think I have what it takes to chase criminals through back alleys and wade through blood at crime scenes.