This manga doesn't have anything new, a usual harem with some minor ecchi, action and supernatural stuff. However, i can't tell why but i'm in love with this manga. Maybe cause the story doesn't rush in any point. Ok i'm not english native so it will be hard for me to explain sorry if i mess up.
In other mangas seems like the characters growth up in power in a matter of seconds like "omg i'm losing again my stronger enemy but since he tried to kill the girl i love a misterious power growth in me with no reason and i can beat him easy now" if you know what i mean, most of the times the autor gives an explanation later of this hidden power but still...
But in this one you can see how and why the characters growth up, the scars on Tsukunes body are a proof of it, at least it's how it looks to me.
As i said, nothins new under the sky with this manga in terms on argument or genre but how the history go on has really mesmerized me, you can understand how and why the caracters become strong but btw take in mind i'm reading the Season II so i'm talking from a more ample perspective. The art is good but how this guy draw the face expresions is really awesome for me.
I'll give it a 8 but for sure it isn't a objetive rating cause is like this manga was done just for me, like if i told to the author what i want and how. In fact i was about to rate it with a 9 but since the first season is a little repetitive and doesn't shows so much of the plot will leave it with a 8. But for sure if season II has a good ending will get a 10 from me. Of course it's my opinion...
Peace and sorry for my bad english.