Shadorne,
Black Metal is much more extreme than AC/DC. I guess you have to be a certain kind of guy to like this music.
YEah I realized I can't realy help you in your genre - BTO "Not Fragile" is about as far as I ever went - wimpy stuff I know.
FWIW - a good contrast to dark angry music is funk. Funk is happy music - try some and you may be surprised to find your feet tapping, although, it takes a while to sink in or catch the bug. Try some repetition of Maceo Parker Roots and Grooves Live for something exciting and interesting - without the anger.