OK people, i have finally found the answer to all your prayers, i shall now tell you what i jsut found.}
Number one, GANTZ the movie, for what i read at a spain site that review the manga of gantz thats released in there, and thanks to the author saying a few things about himself on the end of the volumes, i have foudn out much information. One of those its that they say that because of the great succes of the manga, they are making a animated movie of GANTZ , no idea whatll be about, i hope its about the oni fight (thatll be goood, hope its that and not a created story). anyway, for the people that wont believe what i say, heres the link to the article, its on spanish by the way, so better translate it yourselves:
it also says a lot about the author liking, it seems he adores womens with big breasts, and has a big liking of them, altought he had never had one himself,(Taes reason for existance?) cuz sex on the manga has to be understandable, he cannot put a sex scene without a good reason, and because of that, he tends to relieve his liking on the covers of the chapters....((( that explains a lot)), also to answer question 2:
Why does Oku take so many breaks, well, if you know spanish and have read the article youll already know why, but if not ill tell ya.
"Para crear "Gantz", Hiroya ha buscado a un equipo de informáticos que le diseña todo los fondos en tres dimensiones. Él dibuja a los personajes y diseña las situaciones, y su equipo crea un entorno en el que se desarrollan los acontecimientos. Con ello se imprime un gran realismo y calidad en los detalles."
To create Gantz hroya has searched a team of informtatics that design all the onts on 3 dimentions. HE draw the characters and design the situations, and his team create the surroudings in wich the events develop. With that a great realism and quality on the details its bein printed..
so the reason of so many breaks its cuz hes having a whole team behind him to do the 3d thing, but... the reason of why hes beeen having so long breaks lately, since the ending of last year, might actually be because hes doing the movie... i guess he had a rough time continuating the manga while working on the movie... or maybe theres another reason,--- unknow
PD the moment the movie its out... please inform me guys..