Another Peoplesforum-inspired entry - here are my 25 favorite albums at this particular moment, in rough chronological order, subject to change at any moment based on personal whims:

Skip James, Complete Early Recordings 1930
various artists, Masters of the Delta Blues - The Friends of Charlie Patton
Thelonious Monk, Genius of Modern Music vol. 1 and 2
Howlin’ Wolf, The Chess Box
Chuck Berry, The Great Twenty Eight
Miles Davis, Round About Midnight
Hank Mobley, Soul Station
John Coltrane, Giant Steps
Jerry Butler, Best of
Pink Floyd, Piper at the Gates of Dawn
Rolling Stones, Let it Bleed
Stooges, Fun House
Al Green, Greatest Hits
Steely Dan, The Royal Scam
The Clash, s/t (US version)
Wire, Chairs Missing
Mission of Burma, Signals Calls and Marches
X, Los Angeles
Gang of Four, Solid Gold
The Fall, Grotesque
Pavement, Slanted and Enchanted
Afghan Whigs, Gentlemen
Scud Mountain Boys, Massachusetts
Radiohead, OK Computer
Dismemberment Plan, Emergency and I