Who has tried to build one? Were you successful? What were the challenges? What was the cost? Where did you get the parts?
Finally, how would you compare a built system to a pre-built one?
Now, myself, I haven't tried to build a gaming computer - but I'm not really into that stuff. Anyway, I do need a gaming computer cause I am into 3D computer art - and that stuff works really well on a gaming computer.