I have been to all 4 Moderates and in some cases multiple times I like different resorts for different items. Rooms are pretty much all the same, different theming, same idea.
Best Main Pool Area: Coronado Springs
Best Sit down restaurant: PO Riverside
Best Gardens & landscaping PO Riverside
Most Intimate: PO French Quarter
Biggest: Toss up between Carribean and Coronado
Warmest resort (temperature) Coronado Springs
Most rockin' Night spot

O Riverside
Best Layout of Bus stops: Carribean Beach
My advice is to take a look at ALL of the pics for these on
WWW.WDWIG.COM and kinda decide from there. All of them are wonderful and Id Recommend any of them. Actually I have!!! Some of my friends are going and I directed them towards the Moderates. Love the quiet, the nice pool area, and of course, the price!!! Best of luck!!