Almost anything metal, neue deutche harde, classical, techno, classic rock, melodic rock (like Alan Parsons), some punk, a little country/pop/rap/anything else.
Pretty well rounded <img src="/ubbthreads/images/graemlins/wink.gif" alt="" />
As for metal, resently discovered "The Sword" and can't get enough of them, totally awesome music. If you don't already know them, check them out on youtube or something.