I kick in some thrash or death usually
(Testament, Legion Of The Damned, Kreator, Exodus, Kalmah etc...)
or on the otherside of the spectre I listen to extremely relaxing music, mostly post-rock or reggae
(Sigur Rós, God Is An Astronaut, Red Sparowes, Jimmy Cliff, Bob Marley, UB40 etc...)
rarely listen to anything in between at those kind of days, mostly the extreme sides of both :P