Story:
Even though I'm not a great vampire genre fan I liked the story of this anime. It has a nice build-up without leaving you guessing too much. The smooth development of the story and the nice cliffhangers keep you interested and because of there are only 12 episodes it's an easy to watch show. 9/10
Animation:
The animation style of Black Blood Brothers is a kind of cartoonish, but that really fits the story. This only goes for the shape of the characters, because there movements are fluent and mature. Especially the fights are done very nicely and makes you wanting more. In contrast to most vampire series, the animation of this show is pretty bright, which gives it a less serious look.
I give the animation 9/10.
Sound:
The OP is "Ashita no Kioku" by Naozumi Takahashi. It's a nice J-rock song which just rocks.
The ED is "Shinkirou" by LOVEHOLIC and is a typical J-pop ED.
I liked the way the special FX were done in this series. The sounds were very realistic, like the clashing of the swords and the gunfire. Also does the background music fit the action. Because of that you almost don't notice it. 8/10
Character:
The development of the characters is done very well in only 12 episodes. They also have many different sides. The series is pretty serious, but they managed to put in some funny remarks which makes the show not too heavy. Especially the main character Jirou has some funny one liners every now and then. 9/10
Enjoyment:
This is a short, action-packed, funny vampire series. I really loved watching this show and I hope there will be a second season. This all depends on the DVD sales, so when they are released, please buy them. Since this show only has 12 episodes you don't need to spend a fortune on just these few DVD's.
If you like an easy to follow story, action and vampires, this is definitely a show for you! I give Black Blood Brothers an overall score of 9/10.