Primarily underground conscious hip hop..
P.O.S .. hell anything doomtree really
Jedi Mind Tricks
Murs
Immortal Technique
A more mainstream comparison would be something similar to the roots, which I also love.
I listen to a bit of everything, but that's the main schtick I'm on currently.
Most of it's political, and has a message, none of the BS you hear on the radio, hip hop wise anyways.