I emailed my brother, who's been twice in the last three or four years.
This is the first email response I've received from him in under 72 hours, so...congratulations?! smileys/wink.gif Per Brian (edited for grammar, because I'm his sister and because I copyedit everything):
"As far as PR goes, while we've driven all over, I think our short list would be:
1. Castillo San Felipe Del Morro. (Amazing views!)
2. Viejo San Juan. (Beautiful pastel building colors, small enchanted cobblestone streets reminiscent of Italy, and some wonderful restaurants!) (Editor: Duh. Also, WHICH RESTAURANTS? I've emailed for specifics.)
3. El Yunque Rainforest. (Incredible views, great ruins/towers to walk among, wonderful facilities, some great local craftspeople and artisans as well. Worth the drive or tour bus, but get out and do a hike or foot tour--also worth it!.)
4. Bioluminescent Bay (Vieques) or Lake (Fajardo). It's fun, you get wet, and it is NOT a gimmick. The agitation of the water in your kayak makes the water glow. It's breathtaking. The glowing water will bead up on your lap and slowly dim. Nature is indeed amazing. The Fajardo tour goes through a series of mangrove forests that are really pretty impressive, as is the nature living within them as well."