Well ... I'll be the first to admit that Blood+ wouldn't be to everyone's taste - it did lean very much towards the drama side of things - then again, that kinda happens to be one of my preferences
Give Dance in the Vampire Bund a try - I found that quite enjoyable as well. A bit on the short side, but that might stop it from becoming to drawn out for some people.
Other Vampire related series I enjoyed as well were Lunar Legend Tsukihime (and I now suddenly have an urge to watch it again ... damn), and ... well ... I doubt Moon Phase will be everyone's cup of tea as well, since it's more light-hearted - but that made it into my retail DVD collection. I still need to watch Shiki.