depends on how/where i am driving, if i am in no hurry and around town i listen to a random radio station
cruising down the highway at a human pace, techno - keeps my mood right
at ludicrous speed (they've gone plaid!<img src="#/f/iB_html/non-cgi/emoticons/wink.gif" border="0" valign="absmiddle" alt='
'> heavier stuff (for the 5 hour drives from northern VT to southern MA, that really only take 4)