If you play jazz, then you play with your fingers. If you're playing rock, you use a pick. There's really no rhyme or reason to that other than that's just the way it has been.
“I went pretty much for one tone, and I knew at that time that I wanted to play a Rickenbacker.”
“I don't want reporters to talk to me because I'm a revolutionary and if it got out that I'm basically friendly with Obama it would hurt Obama.”