Kind of a pointless-but-fun post for those of you who drive...what music do you enjoy most behind the wheel? It kinda depends on my mood, here are some of my favourites:

The Karma Collection
Rush - Power Windows
Smashing Pumpkins greatest hits
Queen - Greatest Hits II
Vai - Fire Garden
Mike Oldfield: Five Miles Out
Eric Johnson: Ah Via Musicom
Dream Theater: Images and words
Erasure: (just about anything)

I think there are certain rhythms and beats I prefer when driving...I often find myself chaging gears in time with the track.
Contrary to many metal fans I find Metallica lousy to drive to....don't know why, just doesn't fire me up the way it does any other time. Same goes for Iron Maiden - not good for the road at all.