I stopped using Windows when Ubuntu became the popular Linux flavour of choice. I haven't looked back although I didn't really like the switch to Unity that much. I have adapted rather than go some Linux Mint or other route. I learned how to 'alt-tab' again but still find Unity a tad compromised when it comes to easily switching between terminal windows.
Nonetheless I am glad the Ubuntu dash is a 'drop-down' affair rather than the anti-pattern 'drop-up' menu.
Maybe now that Apple have all those icons in the bottom and Windows has the 'drop-up' menu the 'frame' of interaction is understood that way, to be as natural as a 'QWERTY' keyboard.