Only a guy totally enamored with you would be able to tolerate the annoying way you bite your nails when you're nervous. But instead of getting annoyed, he finds it adorable. He'll even try to help you through whatever is making you nervous in the first place. Whether it's a comforting arm around your shoulder or a kiss on the cheek, he truly 'gets' you and loves you no matter what.
Or maybe it's the way you snort when you're laughing. Your family may have always made fun of you for it, but your man will think it's one of the cutest things he's ever heard. Likewise, you'll love the way he takes up the entire bed, because it means you can be closer to him. You'll even put up with how forgetful he is when it comes to putting on deodorant.