I started it a while ago but haven't kept up with it but I do agree that Seth and Aemond are so similar to me. Especially the whole isolation from family, the sexual assault enacted on them by their brothers (Aegon's was by proxy but I wouldn't put anything past him in that regard, he is capable of cruelty despite what some may think), and the way that they both put up a front of uncaring coldness. Their reputations both seem to precede them. (It's been years since I read it, so I'm not sure if I remember everything correctly).

Horus is very Breakbones Luke. Very in love with his uncle and I loved the moment he got jealous when Seth was traveling with that other guy.