Throughout the series, it's been either straight up drama or drama mixed in with little comedy. But the ending snuck up with and tragedy out of blue. I love tragedies, and have been looking everywhere for one. Low quality tragedy nowadays doesn't even affect my emotion any more. In the case of Mokke, I wouldn't exactly call it a "quality" tragedy. However, it snuck up so fast with every little forcast, when I realized there's a tragedy coming, it's already over. It's like a big surprise right in your face. Very well made. But of course, like all tragedies lately, they just have to tag on an extra episode to wash away the effect of tragedy. Suckers...
Final scoreboard (of 5):
Drama: 4.5 (Independent episodes, but lots of drama within each)
Comedy: 3.5 (It's not its focus)
Action: 3.5 (Not its focus either)
Art/Animation: 3.5 (I still don't like its art style)
Sound/Music: 3.75 (The opening theme song is pretty good)
Character: 4.5 (In depth development)
Plot: N/A (There's really no plot what so ever)
Ending: 4.5 (Nice job on sneaking that tragedy up)
Re-watch value: 3.5 (Maybe just for the reference on Japanese mythologies)
Overall (not average): 4 ~ Knowledgable, Light, Dramatic
Recommendation: Really depends. To be able to enjoy this anime, you have to not mind slightly slower than normal pace throughout the series; not mind the fact there is no evolving plot line; and is interested in learning some traditional Japanese mythology and ghost stories. If your answer to those three are "positive", the you'd enjoy this series. Otherwise, I'd say don't waste your time on it.