In the latest Dexter book (Double Dexter), Dexter is shown a picture of himself, and thinks to himself that he's rather handsome-looking, as though he's noticing this for the first time.
I appreciated this little detail, because when they first started making the Dexter TV series, I thought that Michael C. Hall was entirely too attractive to play Dexter. He's way more handsome than my mental image of Dexter based on the books. So I like how the author wrote in the possibility that Dexter has always been as attractive as Michael C. Hall and just hasn't noticed or mentioned it before. This could have been hand-waved as a function of the two different continuities, but instead the author fixed it. I appreciate that.