Jaime Lannister seems to have an innately contrary personality, where as soon as you start to like him he's determined to make you hate him again. Despite the fact that he starts off as a clearly immoral character, engaging in an adulterous, incestuous relationship with his twin sister and pushing small children off towers, it's difficult not to like him a tiny bit. A big part of that comes down to Nikolaj Coster-Waldau and his natural charisma, but it's also George R.R. Martin's conscious decision to create a character that you like almost against your better judgment. Especially when he pairs up with Brienne of Tarth and begins to experience a period of emotional growth, and we learn the truth about his reputation as the Kingslayer. Maybe he's not such a bad guy after all. Of course, recently the pendulum has swung in the opposite direction and we'll soon have to find another reason to dub him morally ambiguous and conflicted and all those other things we call characters who are bad but we have to find a way to justify our love for them.