When given a Mac Pro as a workstation at my last job I honestly gave OSX fair chance as I hadn't used it since OS9 or there about. After 3 weeks of unrelenting pain I bootcamped Windows 7 and never booted back into OSX.
iOS is alright; my wife has an iPad and I can pick that up and figure out what's going on, much like Android or Windows Phone. So until Apple pulls a "Windows 8" and makes OSX operate like iOS I personally won't touch it again.