I've always been a naked man my self 🙂 with ipods, iphones etc. I will get iPad2 and definitely not use a case.
I love the way they feel and look. An iPod felt so much better in the hand bare. That stainless steel back felt really luxurious. It felt really good and it was someting to admire. I hate cases. i hate the way they look, feel.
I bought an ipod years ago, and got one of those silicon skins for it. I hated the way it looked and thought it made it look poxy. What's worse is after a year of using it, dirt had gotten under the skin and trapped there rubbing around scratching the hell out of it. So it actually did more damage than good.
Now I just leave them bare. Look after them. If i'm going to store it or put it in a bag or something then i have a little soft slip bag that I use just to protect it from keys etc. But I think the device is there to use and enjoy, not hide away in a lame and poxy looking case.