We think we do, but we don't. No one REALLY likes perfect. Perfect is boring. And perfect characters in a novel are like a coffin nail.
Readers want relatable. So think real life.
For instance, I know a Christian girl who got into an argument with her husband. She just KNEW she was right. She even had Scriptures to prove it. But her husband didn't see it that way. It was a really frustrating situation. Another Christian friend said to her "Guess it's time to start praying for conviction for your husband, and let God handle it." The girl said "You're right. And I will. I'm just still in the 'praying he stubs his toe' stage."
That's real life. That's not being perfect. And I bet we've all had similar situations/conversations like that one :) So put that into your characters. How SHOULD your characters respond to an event? Think about that, then maybe do the opposite. Or do what your first instinct is, you know - that first instinct we have like "toe-stubbing-girl" that we as Christians typically turn off because we know it's not the right thing to do/say. Have your characters do it or say it!
THAT is worth reading.
Christian fiction already has a bad rap for being predictable, preachy, or perfect. Unrealistic characters. Cookie cutter characters who do the perfect thing that no one can relate to.
Let's show them they're wrong :)