I used linux as my only OS sans VMs from roughly 2008 till 2011. I finally gave up because it handled monitor switching, multiple monitors so poorly (using Nvidia GPU). I begrudgingly switched to windows because I owned the hardware already, and it was the only option. Windows sucks, the lack of a usable shell kills it, full stop, nothing else windows does matters. And no, cygwin doesn't cut it.
Fast forward to now, the only computer I manually interact with is a macbook air. The old desktop hardware became my file server(running FreeNAS) despite being many times faster than the air.
Through this experience I realized what I actually cared about...I run four 'apps' 99% of the time: chrome, sublime text(everything non java), iTerm and IntelliJ(java). That is really all I care about, anything that prevents interacting with these applications as quickly as possible fails. The support stuff, git, a database, a message queue, etc. Runs anywhere. I _rarely_ interact with the 'OS' in ui terms. I rarely use finder, I only use the dock to empty the trash (launch everything through Quicksilver). At the end of the day I love OS X not because it has 'awesome' UI paradigms, but because of all the options I see it the least, it may as well not be there.
OS X is the only OS i've ever used that I just don't think or care about. It sleeps, it wakes up, it deals with new screens, it does all the OS shit so I can just use the apps i want to. Thats why I am hooked using it as a dev machine.