This may be getting a little bit away from the topic and hand, but...
BTW - is a "good" vampire kind of like Angel from Buffy?
In the generic D+D universe, I believe the answer would be no. In the Buffy universe, a vampire is more acurately a demon that has infested the body of the original person. They have all the memories, skills, and abilities of the original person, but not their soul. Where in D+D, becomeing a vampire means a change in the character physically and mentally, in Buffy becoming a vampire would be essentially the same thing as having the character die, except their body happens to still be walking around.
As for Angel, he is a "good vampire" because his soul was returned to his body, so he is once again the original person he was before he was sired, except the demon that had taken up resisdence in his body is still there, leading to a lot of (for lack of a better word) complications. As far as a D+D mechanic, this would be modeled much better by having a character die, have their body raised as a zombie, and then casting a spell to bring the person back to life, only to have their body remain a zombie when they return.