**SPOILER FREE REVIEW**
Claymore is a perfect example of an anime that tries desperately hard to be dark, but completely and utterly fails. This show demonstrates a complete misunderstanding of what actually makes an anime mature. The result is a series of boring, brainless, deus ex machina-filled, melodramatic fight scenes with a static plot and uninteresting/indistinguishable characters (with the exception of one). Tag on an ugly, almost monochromic animation style (in my opinion), an inconsistent soundtrack, and an unsatisfying ending, and you've got yourself a tremendously overrated anime.
Plot: 3/10
In a world where demonic predators called Yoma exist only to kill and eat humans by disguising themselves as other humans, a mysterious organization creates half-human, half-Yoma warriors known as the "Silver Eyed Witches", or more commonly, "Claymores". The story begins with a young boy named Raki who has lost everything in a Yoma attack. He meets Clare, a Claymore, who agrees to let him travel along-side her and experience her Yoma-slaying occupation.
My main problem with Claymore's plot is that it is based on nothing but classic shounen fighting/screaming and melodrama where whoever screams and grunts the loudest is the winner, but it THINKS that it is also about deep psychological themes and "what makes us human". The later aspects are completely butchered and the former aspects are exactly what they sound like.
To give an example: there is a great story arc in the beginning of the show about a Claymore named Teresa and a little girl named Clare. Clare has lost everything and has nowhere else to turn, so she starts following Teresa around. Teresa, who essentially feels no human emotions due to the fact that she is a Claymore, is indifferent to the girl at first, but they eventually grow to have a very touching relationship. This relationship is clearly supposed to parallel the relationship that Clare and Raki now have with each other; someone who thinks she has lost her humanity is proved wrong by a child who has lost everything and grows to see her as a motherly figure.
At this point, Claymore was shaping up to be a very good anime. However, as soon as that arc ends, we get nothing that comes even remotely close to the character development and good themes that we just saw. The relationship between Rocky and Clare receives no further development and eventually decides to go in a, ummm, "different", direction than the one that preceded it. Let's just say the lines become very blurry when it comes to what Clare and Raki actually are to each other.
Butchering the potential of telling a touching story wouldn't have been as bad if the plot that they DID give us wasn't so generic and boring. In addition to the slow pacing, it's just the classic: "Fight the monsters! Get revenge! Get stronger!" kind of plot that really has nothing to offer that you haven't already seen.
The show thinks it is being dark and mature by not being afraid to kill off pointless side characters, but it completely fails to make us care about those characters or what they are fighting for. They continuously hint at the Organization being secretly evil, but that never leads anywhere. The characters all have either shallow motivations (such as revenge) or no motivations at all and are just working as puppets of "The Organization". The fights are all predictable, the side characters add absolutely nothing (more on them later), and the ending is extremely unsatisfying. Everything that the show was building up to abruptly stops, an archetypical shounen moral is quickly crammed in our face, and then it just sort of… ends. There is certainly nothing special about Claymore's plot.
Art: 4/10
Taste in art is subjective, but I really dislike the dark and boring color palate used in Claymore. It fails to set a good atmosphere, and the blood effects are terrible. The EXACT same effect is used over and over and over again and it doesn't even look good! It just looks like a bunch of red lines coming out of the wound! And don't get me started on the way, way overused trope of two people running past each other, swinging their swords at each other, there is a long pause, and THEN somebody starts bleeding! I'm pretty sure claymore uses that stereotype in every single episode. Once or twice is fine, but come on!
Sound: 5/10
The soundtrack sometimes works and sometimes does not. Average OP and ED. The voice acting is average. The sound effects were really below average though. I kid you not: they use the Star Wars gun sound effect in this anime, on multiple occasions! It feels so random and out of place.
Characters: 4/10
Before I talk about the personalities of the characters, let me just say one thing: Claymore might win the award for worst character design in anime history. News flash guys! You can only have so many characters with blonde hair, silver eyes, and the exact same outfit before it becomes impossible tell them apart! Good luck trying to remember the name of the characters in this anime, I mean seriously! I was happy whenever one of them died because that was one less to keep track of.
Anyway, the characters in Claymore are certainly nothing special. Clare is the same as any other stereotypical shounen protagonist, except she is a girl. She is motivated almost solely by revenge and the only thing different about her is her relationship with Raki, but I already touched on how that was botched. As the protagonist, she is constantly busting out deus ex machina after deus ex machina to the point that it just becomes unbearable.
I have mixed feelings about Raki. He is a genuine character, clearly expressing his feelings at all times, but he is also very annoying, particularly towards the end. He starts out as someone who is easy to feel sympathy for; he has nothing left and the way he latches on to Clare is touching at first, but since that plot element receives no development, it just becomes stale and irritating. He ends up getting in the way more often then he helps anyone.
With the exception of one, the side characters are worthless. Occasionally one of them might receive 3 minutes of development, but the only purpose they serve is death fodder. I can't remember the names of more then 3 of them, and there were dozens.
The only character I truly liked was Teresa. She is the only character who we really get to see go through a change; she goes from a cold emotionless tool who mindlessly kills for the sake of "The Organization" to a loving person who realizes that she is still human. If Teresa had gotten a LOT more screen time, I would have probably enjoyed Claymore.
Overall: 4/10
As a relatively highly rated shounen, I must say that Claymore fails to live up to it's hype. It simply doesn't differentiate itself from the rest of the genre in any meaningful way (a female-dominated cast is unique but poorly written). The plot is static , uninteresting, and peaks after the first real storyarc, the animation is not appealing, and the characters are nothing special. If you are looking for a unique shounen, you won't find it here. If you are a fan of shounen in general though, I could see how you could enjoy it. Personally, it wasn't my cup of tea.