07 ghost tries to start off with a bang as the main characters life is turned upside down by a resurfacing memory. Then, pretty much nothing happens for the next 7 episodes, except cheesy dialogue, lots of flashback and predictable character development. The rest of the series is mostly made up of random events strung together in some sort of a plot, issues being resolved only to torture the protagonist again later on.
Like this, the series slowly crawls to about episode 24 where all of a sudden all the sense, action and tension the 10 something episodes before that lacked are used up at once. Because of this, I might just watch at least the first episode of the second season that is most likely to come. But just maaaaybe. XD
People talking about yaoi undertones: No. just no. There is a strong manly friendship between some of the characters, but it isn't of a romantic nature. Even when one character says he loves the other one, it's meant as his best friend.
The series is watchable, but please don't expect anything great or even good. I would have liked more depth, and stability in emotion, especially from the main character, who kept getting together his resolve and losing it in the brink of an eye. The political tension and maneuvering that was tried to infuse the story with at some point remained dull and uninspired. Also, the nun trio(pretty much the only females aside from the mermaid thing that just made nyuu noises most of the time) became increasingly annoying, bordering on the aggravating with their goody-goody god is so wonderful comments all the time.
One last thing: It would have been great if the mangaka or animation team would have picked up a german dictionary even once. As a native speaker,when one of the main characters(Frau) is being pretty bad-ass, or teaching the main character something important, and then his name is said, which means woman, or more commonly used, wife, this just ruins the moment and makes it hard taking what is happening seriously. More ridiculous names like countries called "answer" and "soul" show that no attention whatsoever was paid to this.
Overall, watch it if you have to, it's not a complete waste of time, but there are way better things out there, like D-Gray.Man if you're looking for something better with a similar feel to it. The manga is a good tip as well.