Around the time of my junior year in high school I pretty much listened to the same three records every day for I'd say about an 8 month period:
Are You Experienced - Jimi Hendrix
Couldn't Stand The Weather - Stevie Ray Vaughan
LIVE AT THE FILLMORE EAST -THE ALLMAN BROTHERS
LIVE AT THE FILLMORE still blows me away. There is something to be said for 15-20 minute songs that can hold your attention for their entire length.