I've worked professionally on Windows and Mac; using Visual Basic, C#, Java, Objective-C and Qt Creator (which is C++ and Javascript); for web apps, desktop applications, and mobile apps (iOS, Blackberry and Android). I have my personal preferences but they're all viable platforms/languages/frameworks/devices and anything that needs doing can be done on them one way or another. The idea that one of these is vastly and objectively superior to all others is just pseudo-religious nonsense.