The last manga i read that i liked very much is MPD-Psycho Volume 1
It is a dark,horror manga with absurd twists and sci-fi touches
heres plot sample : In MPD-Psycho Volume One, police detective Kobayashi Yousuke's life is changed forever after a serial killer notices something "special" about him. That same killer mutilates Kobayashi's wife and kick-starts a "multiple personality battle" within Kobayashi that pushes him into a complex tempest of interconnected deviants and evil forces.
I realy liked this manga for its unsuspecting events and a dark story. =)