We still have original Mickey Crocs that we only use on vacation. I prefer socks, my husband wears socks when it's cool out, and no socks in the heat.
If anyone cares now, here's a really important tip. If your Crocs are snug in any spots, or like me, you have a high arch and the top of the Croc rubs the top of your feet, you can heat the Crocs with a hair dryer and stretch them out. I have heated them and them slip them on over socks, and it gives the space to stop the rubbing.
I have Mickey Crocs, regular Crocs, flip flop Crocs, sneaker Crocs, and no-hole Crocs. Absolutely LOVE them. Don't wear them all the time any more, but they are by far the best shoes for the parks.