Well...you did ask for it...
Tool,Hard Response,anything from Mike Patton,Apartment 26,Assassins of God(hehe),Brujeria,Ephel Duath,Helmet,Kyuss,Machine Head,!Ministry!,Nailbomb,Opeth,Pitchshifter,NoMeansNo,Richard Cheese,Sick Of It All,Slipknot,Mars Volta,Unsane,Victim's Family,Voivod,Zeni Geva and that's tip of my scary iceberg,there is much more on my N95 and around house.
It has to be fast,slow music makes me sleepy.