Objective-C is a neat little language. Don't get me wrong - I would never go back to it, largely because of runtime errors due to duck-typing - but there were definitely things to like about it.

The best part was the perfect C/C++ interop. When I was working on iOS apps in Objective C, I found myself writing a lot of pure functional code using C and it was pretty neat to be able to integrate that with the OO stuff from Obj C so easily and with a clear dividing line.