on Jane Friedman site:

I’m a big fan of antiheroes. A flawed character is just so much more interesting than your classic Dudley Do-Right. Anyone can like a character who makes the right choices and defends justice all the time. But that just doesn’t feel very authentic.

Can I just say it? True confessions? Traditionally heroic, always-good characters get boring.

Give me a character who struggles. Give me a character with flaws big enough to get in their way. Give me a character with complexity and baggage. This is a character that might surprise me. Perhaps not for the better—but I’ll be on the edge of my seat for sure.

I follow this mantra as much when writing my own characters as I do in my reading choices. Some—okay, most—of my characters are really rough around the edges.

But as my editor is always patiently reminding me, a lot of people don’t like unlikeable characters, on reasons of unlikeable-ness. This can be an especially perilous with female characters, whose margin for likability is even tighter than their male counterparts.

As I finished the final novel in my fantasy series this year, I gave some deep reflection to what exactly where the line is for unlikeable characters.