Be sure to pay attention to the time of year you may be visiting Daytona Beach.
Run for the Sun (bike week) spring break time, special events, races all increase the population of Daytona Beach exponentially and can really interfere in your enjoyment of the place.
Cocoa Beach is our personal favorite. We go because we like the beach, not the surrounding area. Plus, it has the very best seafood place on the east coast of Florida, Maine'ly Lobster. It's essentially a take out (but there is some limited outdoor seating) place that offers the freshest seafood going.