I use the Ringke Fusion Clear myself. I used the same case for my Nexus 5 (only it had teal around the sides and it works very well to protect it from minor drops, being bumped into stuff in my bag, etc... without being too bulky.

However, I prioritize customization above almost all else in my phones. I love using these cases because they're clear in the back and come with a template so you can cut out a custom image to stick in between the phone and the case so it looks like you have a custom case. They're very well done and look great, but without being as expensive as actual custom cases (and I could have a different case literally every day if I felt like it).

Like I said though, it's been keeping my phone safe since it protrudes out enough to keep the camera lens from resting on whatever surface I put it on, or the front if I set it on it's face. Plus it has a headphone jack cover to keep dust out. I'm pretty gentle with my phones, but it doesn't have a scratch on it, and my old Nexus 5 looks brand new still.