anyone who thinks bob dylan is a "terrible" singer hasn't heard nashville skyline. it doesn't sound like "bob dylan." the "bob dylan" you are all familiar with is a character created by bob dylan. the fact remains that you might not like that character's voice, but that voice is striking, unmistakable and forces you to listen to what is being said. i believe it was a calculated move. think of how many assholes with guitars were playing folk songs back then...bob dylan just had something special to say, and he needed a way to get people to listen.