I personally dont believe in this, but yes there are people who do. I'd rather not get into the rhythm vs. melody debate but i'd like to say for me the live performance, the interaction with audience is all a big part of the experience for me. Playing what i like is fine by me but i like the challenge of creating something that others will like. But then again my goals and reasons for playing music are different.
Guitar: Ibanez S570B
Amplifier: Peavey vypyr 75w
Pedals: Digitech Bad Monkey Overdrive, MI Effects Crunchbox, Blackstar HT-Metal, Boss DD-3, Boss NS-2