CalicosineFloating action buttons are a symptom of Google's unhealthy obsession with hiding user interface elements even if it causes the user experience to suffer because the Google design team doesn't seem to understand that they should only be making the user interface less overwhelming while still clearly presenting everything someone can do and not oversimplifying to remove sensible hints of stuff that can be done (only toolbar with expander).
In fact, floating action buttons are so much worse than a toolbar with a button that's given main priority because they can cover up stuff you're reading if you don't use a screen reader. A user interface shouldn't constantly remind you that its design was made as an ill-conceived project at a tech megacorp, or if it does remind you of the megacorp-ness due to philosophical stuff like in Metro, it should be easy to use and not get in your way.
"I have strong design opinions."
The strong design opinions: "Google is a Yes-Man cult."