This is the first PC I've built. I wanted to a build a small form factor, HTPC style machine that was beefy enough to play current games on max settings at 1080 as well as run Plex, Sonarr, Couchpotato, NZBget, and other media server stuff. I've connected this machine to my living room home theater, using an Epson cinema projector as the display. I used the brand new ML08B case from Silverstone and I liked it a lot. This build takes advantage of a suggested mod that I found on reddit and the Overclockers forum that allows you to remove all the optical drive mounting hardware in order to install a 3.5" HDD instead. I also had to remove the heatspreaders on one of the Ripjaw RAM DIMMs in order to get it to fit in the slot underneath the CPU cooler.
The GPU runs pretty hot because I have the machine in a horizontal position, which decreases passive ventilation to the GPU side of the case. The only other issue I have with this build is that the WIFI speeds are very slow. Still need to troubleshoot that, but I'm considering just running a Powerline Ethernet setup from this machine to my router. I haven't overclocked the CPU or GPU yet, so that's the next thing to try. Currently playing Witcher 3 on max settings (with Hairworks disabled).