When this topic comes up, I always throw my vote in for Daytona Beach. You can't get a better parking situation. For $20, you literally can park on the beach. So your car is right there with you. If you've got kids and have to bring beach toys, blanket, etc...it's super convenient. The beach itself is very nice and atmosphere is fine. We don't spend all day and night there. It's only 70 minutes from WDW, so we'll leave our townhouse at 9am, hit the beach at 10:15am. By 2:30pm or so, we've had enough sun and surf and head back. Get home, shower, relax and by 5pm we can head out to hit a park or just chill for the night.