First of all, I generally dislike cases for my devices. I understand their utility, but I hate the way they often destroy the form factor. My Droid doesn't have a case and neither does my iPod touch. I thought about it several times and took a close look at what was available, but I never could bring myself to do it. They make the devices clunkier and thicker than they should be. Also, not having a case makes me feel like a tough guy who lives dangerously and plays by his own rules.
Apple clearly spends a lot of time making sure their form factor is designed in an appealing manner. The iPad is no exception. I love the way it looks, and its dimensions are perfect. I picked up what has been a surprisingly elusive Apple case on release day. I was against it but knew that I planned to travel with my iPad, so I took the plunge. I figured I'd only use it while transporting the iPad. I would then remove the evil thing when I arrived at my destination.