This is my first time building a PC.
It all started when I moved into a new place where my iMac (2014) had to be positioned perpendicular to my TV. I like to be able to watch TV when I'm playing certain games so I bought an L-shaped desk and a second (27" 4K 60 Hz) monitor to place parallel to the TV. Unsurprisingly, the iMac (which had a hard enough time driving its own 5K display) couldn't keep up so I decided to build a dedicated gaming machine. I'm using use the iMac for music production but may switch that over to the PC in time.
I love white LEDs and decided to follow a white and black color scheme early on. I also really enjoy the aesthetic of NZXT and knew I wanted to use their case and cooling products.
Overall, things went better than expected! The hardest part was figuring out how to connect the power cables (I had guessed correctly but was terrified of being wrong and frying one of the components) but a post to /r/buildapc confirmed that there was nothing to worry about. I'm not particularly happy with the rear cable management and will probably try to clean that up at some point in the future. I'm also considering adding 2 more 140mm fans to make a push-pull setup for the X62 radiator.
I've had it for almost two weeks now and haven't had any issues so far. GTA V and Skyrim are running great in 4K at 60 fps with mostly highest settings (I did try one setting in GTA V that caused problems but don't remember which one) and I'm looking forward to trying some others after I finish those. My old favorites (Civilization VI, Cities: Skylines, and Minecraft) are also performing better than ever.
So far, I've done a little bit of overclocking on my GPU using Precision X1, I have set the memory clock to 750 and the GPU clock to 100. I haven't tried overclocking the CPU yet.
If you're wondering about the keyboard/mouse situation, I have a USB switch that allows me to switch control back and forth between the computers. It works pretty well but if I switch it to the iMac while the PC is asleep, the mouse and keyboard won't be able to wake up the PC after switching back.