As soon as summer does arrive the only "tune" i'll be reaching for is the Dreamscience type, cant wait to get DSCi back onto my car - really does suck in the wet.
Music wise im quite flexible and summertime gets some great tunes every year. My ipod classics include lots of Oasis, Kings of Leon, Muse, lots of dance music (prefer classic dance music) etc, loving florence & the machine album at the minute but that will soon be replaced by something else.
If I had to pick just one i'd say Oasis - Slide Away
Foo Fighters, best song in ST is "for all the cows", easy cruising in the slower parts and right foot down when Grohl starts yelling... loud rock music is bad for fuel consumption and fines... Average speed always goes up when playing Nirvana. More prone to road rage too :S