Third Orsay.
I'll add:
1) Old Ponte Vedra and the Inn/Club. Never seen such a high end area with such a low level of pretentiousness. Screams "beach" rather than Palm Beach. Best golf in the world. 5 star resort that is somehow still low-key and family friendly, yet is also appealing to young professionals and open to locals/townies alike. Beautiful scenery. Ridiculously good climate. Proximity to bars/great restaurants. Safe. Excellent schools. It's even got a gay population that rivals Riverside's, and is potentially younger. It is just so appealing to such a broad group of people, it's no wonder you can't find anything for sale or for rent out there.
2) Nature preservation...even developers building gated communities in scenic areas (such as ICW) are excellent at preserving old FL ecologies. As much as we all hate these DRIs from a planning perspective, they are at such low density and designed in a way to basically keep wildlife largely intact and not destroy any ecosystems in the process. ICW could easily be a sea of densely built canals at this point, but is still mostly marsh and preserve. If half of Denver's appeal is its access to skiing/camping/rafting/biking, Jacksonville could easily take advantage of the same access to the outdoors.
