A new gaming rig, the other one I had and am still using for school and other stuff had become unstable and had heat issues after about 3 years of non stop work/play. So I decided it was a time for a new build. Hadn't really done a complete build beyond upgrades for 5 years so it was a nice change of pace.
To me a year to get the parts together and find time to actually do it (took single night to get it together and up and running Windows, talk about everything working out & anti-climax, planned a whole day or two over a weekend with problems galore). Only issue was my inexperience with the H80i, took the longest time to fit properly because i wanted to be sure I was doing it correctly, and damn are the stock fans loud compared to the rest of the system.
Didn't encounter anything other than the traditional flat cable routing issues, the GPU fits in like a glove, it's not touching the 3,5" HDD Cage but the fan mount on it unusable. Didn't plan on using it anyways.
Future plans include an extra 140mm fan on top and maybe a bottom mounted fan (not sure about space because of cables). Some extra LEDs perhaps.