Top 23 in Top 25 best anime about vampires you will want to watch right away.
Master of Mosquiton OVA vampire anime ending music
Dark humor is probably not an exclusive specialty of vampire characters, but the Master of Mosquiton OVA anime performed quite well.
In other words, your enjoyment factor for this series will largely depend on how you perceive the interaction between the two main characters. Sadly, the dark humor was not perfectly preserved in the subsequent television series, although familiar jokes still appear frequently.