Having in the last 2 years switched the whole company i work for from Windows to Mac OS with over 200 Macs deployed i can say the only thing that annoys users is the fact the green button does not make a program go full screen WITH the dock still showing. Its my only annoyance too. Yosemite made things even worse as users press it now the app goes full screen and they are lost. I don't understand how they are getting the green button so wrong. We try to explain in training how you can have full screen apps in OS X and multiple desktops, but its just lost on them, they want the green button to act like Maximise does in Windows.