I listen to music on my workout rides --where I know the route and course issues very well. I'm less likely to wear them while touring unfamiliar roads or in groups (rude). I have mirrors on all my bikes. My all time favorites are the Koss over-the-ear foam models (KSC75 I think). They don't seal out ambient noise totally. They seem to actually cut down wind noise compared to no headphones. And they allow me to waft music directly into my ears without locking out the rest of the world.