I disliked the High Sparrow because he was wielding power in the same way as all the others, brutally and without mercy.
I started watching the series again from the start and I'm reminded how awful Jaime and Cersei are. Although Jaime has changed a lot, it's hard to get beyond the fact that he pushed Bran out the window.
I had forgotten that Cersei insisted on having Sansa's direwolf, Lady, executed just to save face for Joffrey.
Littlefinger betrayed Ned Stark and bears a lot of responsibility for Ned's ultimate demise.
Varys was loathsome in the first season.
Tyrion is still my favorite from beginning to end.