I was looking for new manga to read on the OneManga site and I found Gantz. It has senseless violence, gratuituos sex scenes and great looking chicks in erotic positions. The concept is that a weird black ball is taking people right from before they die and brings them to a room from which they are sent to battle aliens in the streets of Tokyo. Normal people can't see them or the monsters, but they can be killed by them. And they often are.
This is something only a Japanese could have thought of. People are dying, most people around don't care and they are all trying to show how superior they are compared to others. And then they find something to PROTECT and they cry all the time.
Bottom line: Monsters, Aliens, Vampires, Hot chicks, Sword fighting, Gore, Sex, Rape, Emotional torture... they are all in there. The script doesn't make much sense, though, and I think all characters are emotionally stumped to the level of three year olds. That's how Naruto and InuYasha won so many fans, through carefully crafted emotional landscapes, something Gantz lacks almost completely.
Read Gantz at OneManga.
imDb link for the anime