I have a feeling I might be the only one who actually quite enjoys Devils Blood, haha. I only stumbled upon this anime yesterday and I've already watched 5 episodes and started reading the manga as well. There's something about it that just keeps my interest up. Let's talk about the different aspects of this anime in more detail!
The plot is pretty good if you like the vampire genre even though it's nothing unheard of and there are a few differences compared to usual vampires. There's definitely a lot more blood in the fights between the 'devils' and humans than there is blood-sucking. While the vampires here don't NEED to drink blood, their thirst gets the best of them whenever they SEE human blood. The animations during fights are neat and the overall art is very neat, but nothing especially unique.
Turns out that Taira's childhood friend has been a vampire all along and at the point where events begin, he takes our dear, naive female protagonist to a rather isolated street of the town. That's where Anzai, who is half devil, half human, and part of a special team that focuses on solving (murder) cases involving devils, saves the heroine from her good friend. The two of them more or less immediately fall in love and that's where I find some things rather inedequate. First off, Anzai is really hot (ngl I LOVE his character design), but he already got his hands all over Taira shortly after they met because of a bruise on her lip. And Taira, who has never had a big interest in men enjoys it and even starts dreaming about Anzai who kind of starts stalking her, which she doesn't mind either. Whatever the occasion, she just goes along with the flow. It's completely valid to see her as a bland character because that's what she is, more so for a protagonist. At the same time I can accept that since she sometimes jumps over her own shadow and I've seen way more annoying characters.
Other than that, I can say for sure that I will continue watching this anime. I'm curious on how the relationship between the main protegonists will develop and what else there is to offer, story-wise.