I've haven't built a PC for a while and recently had an urge to build one. Most of the parts cost me nothing as it was leftovers from my previous build or upgrades from others.
Why did I decide OSX? I use my MacBook Pro on a daily basis for work, at home or out having a cup of coffee. I'm sure it's better to just buy an iMac or Mac Mini but where is the fun in that?
Overall, it took a few hours to assemble and install OSX. Minimal issues during install and was fixed shortly after.
Couple parts I will add/upgrade:
Samsung 960 Evo 500GB NVME, 2x8GB So-Dimm Ram, Apple compatible WiFi/BT card, 80mm PWM fan, Better HSF.
8/8/18 Update: Installed Samsung Evo 960, Installed Mojave Beta 6, replaced case fan,
Need to fix: Sleep