Here's a cool thing to bring to light. What rock and roll or any other type of songs that have a guitar solo stick out in your minds as being either the best or really good. Now mind you this is just the Guitar solo not the whole song.

Here are some of the ones I think that are great.

Pink Floyd - Comfortably Numb (live from the Pulse CD)
Eagles - Hotel California
Eric Clapton - The Way You Use It
Joe Satriani - Surfing with the Alien
Testament - Practice What You Preach
Stevie Ray Vaughn - Little Wing
Van Halen - Hot For Teacher (ULTIMATE SOLO EVER!)
Guns and Roses - Paradise City