It's an impossible question, but I think my favorite solo is probly from the long slow "Voodoo Chile" jam on Electric Ladyland. But that solo is great not only because of Hendrix, but because the band is right there with him. It's just an epic track, and there is almost nothing like turning off all the non-lava lights and cranking this song in the pulsating dark. IMO it's absolutely one of the most magical moments I personally have heard captured. I looked for a video of this, but his family (who own his music) must be all over youtube because I couldn't find it! Another way to interpret the question - what solo has most influenced me. I think it would have to be Clapton on Cream's Crossroads from Wheel's of Fire. The solos in that song are maybe the greatest repositories of classic blues licks, and it's key to consider both solos because they build. The first is more restrained and in the middle octave of the guitar, and the second is burning up in the high frets. Besides the actual notes, his tone is just incredible. Epic stuff. 25 years ago I could play both solos note for note, which makes them the only solos I have ever learned to that level of detail. These days, even if I'm playing in some middle eastern sounding mode, I'm still framing the solo within the artistry of Clapton's Crossroads. A final way to interpret the question - the solo I most wish I had played. For me, the ultimate paradigm of muscular almost brutal guitar playing is John McLaughlin. His right hand technique is so powerful it feels to me like he is forcing the notes out of the guitar. Since the 80s, his style has been my greatest source of inspiration and discouragement. I have never managed to get close to his muscularity, but I have copped a few things from him. I have his instructional DVD set, which I got when I saw him in Austin during his farewell tour, but I haven't spent any time with it. Kids are quite a distraction... That said, I'm pretty sure the set focuses on musical concepts rather than technique, so I'm not sure it will get me where I want to go even if I study it hard.