* Quincy and Rachel's entire relationship brings a lot of light and comfort to such a dark series. He raises her as a second daughter after Dracula kills her parents and shows a lot of emotion whenever he needs to save her life. He cares more about protecting her than getting revenge on his archenemy Dracula. When he's in poor health during the second half of the series, he shows concern about Rachel being taken care of and on a path to happiness after he's gone.
* Dracula and Lilith's rare PetTheDog moments (Dracula protecting the occasional kid, Lilith trying to let the woman whose body she's possessing live her own life, etc.) invariably make a good impression on fans.