Greatest Rock Guitar Riffs

A British guitar magazine recently polled it readers to compile a list of the greatest guitar riffs. Guns 'N Roses "Sweet Child of Mine" came in at the number spot. Here's a link to the poll results. As you can see the list is entirely metal oriented.

My list would include:

The Chuck Berry intro
The Chuck Berry rhythm
The Bo Diddley beat
Temptations - My Girl
Kinks - You Really Got Me
Steely Dan - Reelin' In the Years
Sam & Dave (Steve Cropper) - Soul Man
Stone Temple Pilots - Plish
Beatles - I Feel Fine intro
Jimi Hendrix - Purple Haze intro

Is it my fault that nearly all the great riffs are pre-1980?

What's on your list?