I laughed. You aren't playing the right solos.
Edit* Try the Heartbreaker (Zeppelin) solo. That's a little different from three note clusters.
I never said I could only play metallica. Solos are easy, I repeat. I can pick up any guitar, and play a badass solo whenever I want, However I cannot for the like of me play Chords. Perhaps your different Bones, Or im different I dont know. But solo's are in theory and practice easier, they dont require so much chordial coordination.
(also, learned patterns dont represent skill, they represent simple computer like mathematical comprehension, creativity and the ability to create your own music is what makes a musician)