Will try posting photos in the next day or so, but honestly, there are already good ones findable with a simple Google search.
Yes, the clear case is slick to the touch. Having used these for years I'm not bothered by this but if you want a grippy rubbery finish, go for a solid color. I'm not careless about where I put the phone, but in normal use (airline trays, desk at work) no problem. Anything abrasive (concrete, etc) will certainly scratch the clear case. Get a solid if this is a concern.
My only concern is if its slicker than my previous case. I had the Belkin Shield Micra which was basically the free one that came with the 4. Essentially a clear hard plastic. And I never felt that it was slick or anything like that.