I never understood that with phones.
People pay a large premium to have the latest sleek-looking device and then wrap it in thick rubber or pink plastic, doubling it in size and making it look like crap. (Yet if it was ruggedised in the first place, no-one would buy it.)
That.
Having said that, I have 3 cases for my iPad – a sleeve that protects it in my bag, a smart-cover that seemed like a good idea at the time, and a seal thingy waterproof cover that I bought cos I have one for my iPhone and it saved my bacon a few times.
I also have a large collection of shoes 🙁