You've probably already heard that one way to keep your character from being a Mary Sue is to give him flaws. Nobody can sympathise with a perfect character, after all.
But here's something maybe you haven't heard: Readers won't necessarily sympathise with a flawed character either--not unless you make those flaws relatable in one key way.
But here's something maybe you haven't heard: Readers won't necessarily sympathise with a flawed character either--not unless you make those flaws relatable in one key way.