AllNamesTaken,
You should scope out Crocs website sometime because even though I know they just look like plastic shoes they are SO much more than that. If you go to the testimonials page on their site you will see blurb after blurb from health care workers, people with feet problems, people with rheumatoid arthritis who are so much more comfortable now in Crocs. My boss is my age (33) and has RA....the Crocs have helped her SO much. On days when I wear dress shoes to work (even sensible ones), my feet would hurt at the end of the day. When I wear Crocs, that doesn't happen. They conform to your feet and really give your feet great support. There are TONS of staff at the hospital where I work who wear them - they are great for anyone on their feet all day.
While it doesn't look like they have support, they really DO have a lot of support and little "bumps" to help w/ circulation. And there is a whole Orthopedic line of Crocs that are prescribed just by orthopods which started as a result of the success of the regular Crocs.
As far as the question of what STYLE is most comfortable, hmmmm.
I have the Niles - the "sandal" style. I like them, but they do rub in places and I don't think I'd wear them for a long walking distance
I have the flip flops - right now, this is my FAVORITE style - they are extremely comfy (and I normally don't like flip flops because of the lack of support) - that being said, I might be scared to wear them at WDW all day but I bet they would be fine and I will probably take them when we go Feb 07
The Beach style is what I started with and I wore them to the parks EVERY SINGLE day. The one day I wore a different shoe, my feet were killing me. I never, ever had a blister. I don't have Cayman's but I bet those would be the same effect, since they look similar but are closer in fit.
Next stop - Mary Janes!!! I can't wait to get my hands on these, they are so cute!