Watched the first season. And I'm enthralled. Whilst I enjoy Dexter as a character greatly, I like Dexter's Dad, Harry, the most.
Rather than turn Dexter in and institutionalize him, his dad recognized who Dexter was as an individual and worked with what he had to make the best of it. e.g. Harry's Code. In my eyes, Harry is truly a great father whether in the fictional world of Dexter and our real world.
What's strange to me has been comments from other people regarding the show. "Oh that show is so fucked up!" "I feel so wrong for liking Dexter as much as I do." Not once have I been shocked about him as a character and his actions. It just is. <flexes his Ti>