Some of my personaly favorites while stoned:

The Doors - The Ghost Song
The Beatles - The whole "Revolver" CD
Ben Harper - Burn One Down
Steely Dan - Do it Again
Dr. Dre - The Whole Chronic CD
The Beatles - Ticket To Ride
Tom Jones - She's a Lady
Jimi Hendrix - Machine Gun
Jimi Hendrix - Castles Made of Sand
Jimi Hendrix - All Along the Watchtower
The Doors - Light My Fire (I love Manzarek's organ solo)