I listen 80% of the time to classical music...like Max Bruch (If you havent listened to all 3 movements of his Violin Concerto No.1 in G minor...you havent lived!), Mendelssohn, Haydn etc
The other 20% is varied but I have a few groups who are supergroups to me like, The Proclaimers, The Eagles, ELO, Queen etcetera.