One thing I didn't appreciate the Anniv Update doing, and this is on my work laptop were the update was "successful", is automatically removing some programs it deemed incompatible with itself. Fortunately, they were applications I didn't use. But it removed the DisplayDock application that I had on there for a brief time I was using an external port replicator, and it removed Intel's Wireless Dock application that Dell had pre-installed. If I was using a Wireless Dock, I'd be pretty miffed that it decided to take that functionality away, and without any warning whatsoever.
I'm not a Mint or Ubuntu user (I've tried repeatedly to like it, but I just don't). I'm not a Mac OS user (we've been there and done that). I've generally been supportive of Windows and what Microsoft has done with it (I've never had trouble with any version of Windows until now), but this latest update has finally rubbed me the wrong way.
My favorite OS? Probably Chrome OS or Android (which are, of course, Linux-based...but they work with the hardware on which they're installed).