Whereas I find using a Macbook *infuriating*. The non-standard keyboard layout which breaks a lifetime of muscle memory is the primary reason. I bet that dedicated Mac-fans have a similar response to using a standard keyboard though.
I like the Ubuntu desktop environment. I know a lot of people complained about Unity at first, and to be fair, it was a bit hinky to start with. But I persevered, and so did Canonical, and now it's a lot better. On the occasions I have to use a colleague's Mac, the desktop environment drives me nuts as well.
I acknowledge these things can be gotten used to. I understand the package repository situation on Macs is a bit more complex than the almost universal Debian repository system I get to use on Ubuntu though.
They're thinking of standardising us on OSX at work. I'm not looking forward to it. To my mind, the whole "think different" thing is just another kind of lock-in - different keyboard, different desktop idioms, all that stuff designed to only be available on OSX, just like Visual Studio is only available on Windows. At least you can plug in a standard keyboard. Not sure I'm going to be able to remember to push COMMAND everything instead of just using ctrl like a normal person...