A.K.A. Oliver, this machine was built with gaming in mind. Under a bit of a budget (max price allowed was around $1100) I found the power and speed I wanted without having to go over budget. Also, it's green. I like green.
The operating system was not purchased, however (saving me some money) as I received it under license from my university (universities cost money).
The power supply I originally bought did not include the correct power capabilities for the GPU I purchased, however, as a software engineering intern at a computer repair service I was able to swap mine for a used PSU similar to the one listed.
In terms of performance, it does better than I had hoped. I had expected to be able to play games on high quality, while having to skimp on some settings. However, this has not been the case. When installing Skyrim the game automatically detected my hardware capabilities, setting the quality to Ultra High (a great personal success). While there have been some tweaks I've implemented that caused a loss in frame rate, they were generally close to the hardware, and the frame rate loss was not too significant.
As I expand this build I'll likely upgrade my hard drive to a larger size, or simply add a second hard drive. I would also like to add some more (and higher quality) RAM, considering that what I have included came bundled with the mother board. In time (a few years out) I'd like to add another video card using SLI, but only once games have advanced past my very competent GTX 760.