I like objective-c. Message passing and everything that comes along with it leads to some interesting coding opportunities. The real strength of Apple dev though lies in the libraries.

Also, coding for iOS 5+ only makes it a lot easier to write correct code because of things like ARC and weak reference types.

My only problem with Xcode is crashing, but that seems to have mostly been fixed. There is a vim plugin you can use if you prefer those keybindings.