It's a lot of little things that add up. There are a ton of quality utilities that add up to a nice experience. cmd is a lot nicer than ctrl to use as a base

It's a lot of little things that add up. There are a ton of quality utilities that add up to a nice experience. cmd is a lot nicer than ctrl to use as a base for keyboard shortcuts and the keyboard shortcuts are generally well integrated into the os. How the operating system handles events enables a lot of the tweaking apps to work well. I like the single menu bar at the top of the screen. It's unix under the hood and it has a terminal as a first class citizen. Finder is pretty weak but what can you do? There are some alternatives to finder and the architecture of osx allows for them to exist without causing a bunch of the mac equivalent of "blue screens of death". I am sure there are some equivalent utilities for windows and linux but I have some mouse gestures that are system wide that I would be severely disappointed not to have anymore. In general there is a nice little gui that polishes up whatever little utility thing you feel like doing but didn't know. I am sure I could move to linux if I really needed to but there would be things that I missed quite a bit. Edit, a few more: Cmd left and right arrow to go to the beginning and end of a line is great. emacs bindings by default in text areas is nice to have(I think you can turn vi mode on too if you want). Parallels to use windows when I need to for engineering programs that need it and have it seamlessly work as a mac app is great. the hardware is of great quality too. (the mac pro before the trashcan was a thoughtful and modular machine that was a joy to work on) plugging in monitors just works which is great.