How can you make your character more interesting? Dig deeper. Layer them. You don't ever know every single thing about a person when you just meet them, right? It should be the same with your characters. We should learn new things about them as the story unfolds.
Questions to Ask Yourself
1. Do they have any quirks?
Maybe they have something truly peculiar such as saying names in an odd voice to be able to remember them more easily. I personally cannot stop reading a book mid chapter if the page number isn't divisible by five. I do the same things with websites - if I stop on a page, it has to be divisible by five.
2. Do they have any special talents?
This is easier to notice in paranormal fiction, as supernatural talents are often mentioned, but a talent doesn't just have something quite so noticeable. Maybe they're great at talking themselves out of trouble.
3. What literary character does your character most wish they were?
Maybe she always wanted to be Hermione, the girl whose smarts got her ahead. Maybe she dreamed of being tough like Katniss or vulnerable like a lead from a Sarah Dessen novel. Who do they relate to when they read?
4. What information would they leave out telling a potential new date?
These are the telling answers. For example, I never dates that I'm a superstitious Southern gal who always leaves white candles burning. They don't need to know that until they move in and they're stuck with me. (I'm going to assume that potential new dates don't read my posts. And if they do...awkward.) What details about themselves would your characters treat similarly?
5. How would they fill in the blank to the statement "I am a ______." ?
I'm Kristen. I'm a writer, marketing expert, and a chronic maker of really bad jokes.
All puns aside, knowing how your character sees and describes themselves is important. Do they focus on their GPA or future career? Their talents? Their personality? The possibilities are endless.
Don't forget to think about character likability and relatability!