My family had a fantastic vacation in Ricon one Christmas. The locals welcomed us into their community parties, we had a great time buying fish off a guy in a parking lot, drove all over the place to explore, did the little bio bay nearby. Rincon is a very small town--you wouldn't choose it if you can't make your own entertainment or need a hopping night life, although they are a social bunch and there was both surfing and snorkeling in the area. My parents did San Juan a few years later and didn't have the same great time we all had in Rincon.
Lann