These are 10 albums that anyone with a passing interest in rock 'n roll (whatever that means anymore) should have a passing knowledge about. They may not be everyone's favorite albums by these bands, but it's my take that you can't form true opinions about music of today without an understanding of what's come before. No album on this list was released after 1973; many "classic rock" fans have heard these albums until their ears have bled, but they're pretty good building blocks.
Rolling Stones - Let It Bleed
The Who - Who's Next
The Band - Music From Big Pink
Sly & The Family Stone- Stand!
David Bowie - Ziggy Stardust
The Beatles - Revolver
Pink Floyd - Dark Side of the Moon
Jimi Hendrix - Electric Ladyland
Beach Boys - Pet Sounds
Bob Dylan - Bringing It All Back Home