This is the first phone i have ever had a case for. I have the S-Line case, and it is pretty minimal. I felt like the naked phone was just a bit to slick for me, and i didn't want to risk it sliding out of my hand or off my desk. If it had a textured battery cover, i would have probably left it naked, but to me it is just too slippery and not worth the risk.
Plus there have been a higher number of people than typical complaining about short drops and the thing still breaking, drops of less than four feet.