I lived there for over a year in a town called Ceiba, which is less than an hour from San Juan....It's 85 degrees every day and if you want to get some ass, fuck some white girls on the west coast...
The west coast of PR is BEAUTIFUL. Here's where I posted a ton of pics from when I was there plus had a podcast about it. It might be informative to you.
http://www.mrnogood.com/travel/puertorico.htm