Dexter and his Big Bads will always be fascinating characters to watch but since Season 2, cop characters like Deb, LaGuerta, and Angel have undergone a steady decline to the point of being nearly unwatchable. Season 2 was a time in which they were interesting in some way and more sympathetic to us with Deb's struggle to adjust to life after the Ice Truck Killer, LaGuerta's struggle to keep Doakes from going over the edge professionally and later to prove his innocence, Angel being framed for something he didn't do prompting Deb and Dexter to help him out, etc. Even Rita was more interesting of a character back then with her growing a backbone in her relationship with Dexter and her relationship with her mother.