I'll begin by saying that I've seen 07-Ghost in two days. It's been on my to-watch list for long and finally had the time to watch it.
Story 9/10: I can understand why some people give it lower than my vote, it's quite slow-paced and the last fighting scene might be slightly disappointing because there was great anticipation to it. However since the manga is on-going, I expected this. And so I based my vote on the originality of the story (I never thought that I would like an anime based on church, god, and the likes). I firmly believe that to taste the whole story, one must either read the manga or hope for season 2.
Art 10/10: Everything is so well done, I love how the characters where depicted and the scenes were very pretty. I love the characters clothes, especially the 3 bishops' badass clothes.
Sound 10/10: The first thing I go to search after finishing an anime is the soundtrack. Right now I'm listening to 07-Ghost soundtrack while writing this and what can I say, it's amazing. It fitted every scene perfectly. When I watch more than 1 episode per day, I usually skip the OP and ED after hearing them the first time, however I rarely skipped them in 07-Ghost.
Character 9/10: I gave this a 9 for the same reason as the story. I am slightly disappointed that we didn't get to see all the 7 ghosts, however the story isn't finished so I suppose I'll encounter them in the manga. Teito's character development is quite great, he matured a lot and he's even able to smile at the end. I appreciated one scene in general, before the final fight, when Frau sent him to sleep and instead he stayed next to him. About the other characters, I love the 3 bishops' characters, though I feel like there is more to them that needs to be shown. Same goes for the ~bad~ guys.
Enjoyment 10/10: Seeing 25 episodes in 2 days is an obvious proof of how much I enjoyed it. Probably what I personally really liked and enjoyed was the slight shounen-ai undertones in it which can get quite obvious sometimes. Plus there aren't any annoying girls. I don't mind cool girls, but an annoying girl tends to be a turn-off. I also didn't mind it being slow-paced. And since the art and sound, which in my opinion are very important, are perfect, the enjoyment gets a 10 too.
So overall I gave it a 10. Maybe a 9 would be more appropriate since it's not outstanding if it's not continued. However I'm going to assume that it will be continued since I'm off to read the manga.