HTC M8 Users: Do you use a case? Which one?

I'm a very happy new M8 user. However, the phone is surprisingly slippery. I've already dropped it once resulting in a few minor scuffles on the side. I've been going back and forth on a case.. I've never used a case before, but feel like now may be the time given the all metal finish of the phone.

Now, I come to you all! What case do you use? Do you like it? Can you post a real-world photo?