I use a Ghost Armor skin for around the house because it doesn't add any weight. The nice thing is that it is so thin I can use a case when I travel so it's the best of both worlds. Been using this set up since the iPad 2.
I don't worry about drops around the house nearly as much as I worry about all sorts of things when I travel, like the trip in Nov when we hit turbulence and the guy next to me pretty much threw his drink on my iPad 3. Luckily I had just closed the case so all I had to do was go wipe it down. Without the case I'm pretty sure his Coke would have gotten into at least one of the ports. It was a STM Grip so the sides were covered. Wasn't his fault, just a '**** happens' moment.