I do not understand how Apple can get input devices so totally wrong and totally right. They make, bar none, the finest trackpads on the planet and have consistently produced some of the worst mice out there.
Apple has been all over the place on their mice.
I consider the ADB II mouse(the teardrop shaped one, not the wedge) to be something of an ergonomic masterpiece, and actually have one hooked up to my Mac Pro(I use an Extended Keyboard via a Griffin iMate, and just plugged one in since I could) even though I almost never use it.
The puck was widely hated, and I have a tough time using them. They did listen to feedback and add a slight indent to the button, something that makes them a tiny bit better to use but they are still awful.
The "buttonless" pro mouse is actually, IMO, quite comfortable to use BUT it also came along when Apple was heavily pushing the transition to OS X, and OS X really begs for a multi-button mouse.
I'm not sure if Apple has ever gotten around to discontinuing the Mighty Mouse, which I think after a lawsuit or at least a cease and desist became just the "Apple Mouse." I actually really like this particular design. The ergonomics are more or less the same as the Pro mouse, but it has four buttons(capacitive) buttons while still keeping just the simple hinged case/single clicker of the Pro mouse. The achilles heel of this mouse is the scroll ball, which gets gunked up far too easily. I've used both the wired and wireless versions of these for years, including on my Mac Pro 5,1 at home.
I've come around to the Magic Mouse, although I returned the first one I bought. I use one on my Mac Pro at work, and I've come to appreciate its functionality, although initially it drove me crazy to go back and forth between it and a trackpad since most of the gestures use one fewer finger. I do like the "scroll anywhere" functionality, though.
I've not used a Magic Mouse 2, but it bugs me that you can't use it plugged in...