A good guitarist, or should I say "enjoyable" guitarist; one who is pleasant too listen to should have an equal amount of technique (50%) and soul (50%) in his playing. If the scale is unbalanced the music can become boring fast. Shredders are cool to listen to, once, but it can become old to the ears quick. Same with guys who play with all soul and little technique, like Buddy Guy and Santana, they too can become boring and predictable. Guys like Hendrix, Larry Carlton, Robben Ford, Trey Anastosio, and Dickie Betts never seem to wear my ears out.