I wear tight-fitting pants, so I just couldn't stand having the size of the Infuse any larger than it already is. I tried a rubber case (I liked the way it looked), but gave up on it after about 4 days (every time I tried to get it out of my pocket, it was like a little wresting match with myself and me looking like a fool).
With that said, my bare phone looks pristine, and it's been 4 months now. I do admit I am on the side of keeping electronic items in good condition (my 1st Gen. iPod Touch looks like it came out near the 4th Gen. period), but still, I am impressed at how durable the gunmetal border around the phone is. There is a very minute nick at the bottom (I think it was from when I had one too many drinks and was trying to fit the charger mini-USB into the hole and missed a few times), but other than that, I could probably format it and sell it as a new phone.
Ironically enough though, it was funny because the first Infuse that I got from Amazon had a huge dent in the gunmetal border (the bezel for some reason was gaping away from the phone at one portion, leaving a hole where dust and other minutia was collecting). Of course, they replaced it for me, though.