My favorite character was Kareem Said.
I hated Schillinger the most. The most hypocritical character on the show. He claimed to only commit crimes against those who violate his constitutional rights yet he is raping Beecher within an episode or two.
Also he claims that he isn't a **** yet he is the biggest rapist on the show. And not just for "rape" purposes. I also remember that he was nailing Keller when they wee in a different prison together.