I've lived in Los Angeles for five years, so I'm about 30 minutes inland from Santa Monica. It's a beautiful, classic Southern California destination with a beach, a pier, and an abundance of classy shopping and dining spots.
But I decided to visit Jacksonville Beach, Florida, (or "Jax Beach" as I heard it referred to by many locals) for a spring trip. I liked that it's still on the "up and coming" end of the tourism spectrum. It felt like an unpretentious surfers' paradise.
Jacksonville Beach felt similar to Santa Monica, but there were also a few distinct differences between the beach towns on either coast.