Ceremony
For us, potential weather was the biggest factor. Though we're from the "Frozen Tundra" and used to the cold, for whatever reason when we go to Florida in the winter time we tend to bring record low temps with us
I really did not like the idea of the WP, and wanted my wedding in France at the WS. However, a 9 am ceremony just woudn't have been good for us, since neither of us are morning people. So I started looking at the other locations, and just couldn't get over the outside factor. I am a total planning freak so a last minute change would just throw me, and I don't like the concept of a ball-room wedding (though they can be pretty - just not for me) So that narrowed or choice down to basically the WP.
When we went to the site visit (I agree with some of the above, if you can get down there to look at the sites - do so, cuz the pictures don't do them justice.) I really came to peace with the WP. It is quite beautiful. It is more expensive, but it comes with the sound and organist - which would be extras at other locations...
Reception -
Again I said no to a ballroom, which narrowed our choices down. We were looking originally for something in Epcot - WS, but we were really left with outdoor choices, which I just couldn't bring myself to do. I liked the LSS, but it didn't seem to go with our "funky elegance" theme. Plus I kinda wanted an outside photographer and I didn't want to subject my guests to a long bus ride between reception and ceremony. So I started looking in the MK area and decided on the CG. We're using both rooms, one for pre-reception, one for reception. We really settled on this because of the view and the menu. I know many people don't like the CG menus becuase you can't change them, but that actually worked well for us, as we both really liked the menus offered.
And as an added benefit of this situation, we
might be able to eliminate the bus I was worried about and treat our guests to a boat-ride accross the lagoon.
I think in the end the way that worked for me was deciding what I didn't want (ballrooms, outdoor locations) and what was important to me (treating our guests to a unique experience, the 'feel' of the location) and that helped me narrow down to be best choices for me.
Happy planning!