When the characters in your book feel more like real people, it’s a lot easier for readers to relate to them. That makes it a lot easier for readers to like your books. It sounds like a simple formula, but it’s not. That’s why it works to use little tricks throughout your books to humanize characters. This is why your characters need a hobby.
Humanizing Your Characters
All of your characters should be three-dimensional. That means they have hopes, dreams, fears, regrets, habits...and yes, hobbies. The more of this kind of everyday stuff you can integrate into your character, the more real they will feel. But you can’t give a character a hobby just for the sake of doing it. Everything you put in your book should be in there for a reason, and that includes the hobby that you humanize your character with.