The orientation of a black hole rotation axis relative to its host galaxy rotation axis is an important diagnostic for the structure of the accretion disk and the nuclear region of the galaxy. Since jets are believed to be launched perpendicular to accretion disks, and the gas which fuels the nucleus is expected to originate in the galaxy disk, or if new gas is added to the galaxy it will end up in the disk, the simplest picture suggests that jets should be perpendicular to galaxy disks. However, observations show that this assumption is wrong. I will talk about the results obtained for Seyfert and Radio galaxies, their implications for the structure of accretion disks and host galaxy disks, as well as for the processes responsible for feeding the nucleus.