I think the excitement over finally getting a faster computer used to get me on a mental high that lasted through the assembly like a kid waiting for Christmas presents, but these days I just want to get it over with and the damn thing to work. I only do it because it's the only way to get the components I want, looked it over now and still can't find a PC builder that'll give me this GTX 970 SLI setup. I.
I'm in a similar boat. I'm even willing to pay a 30% upcharge for someone else to build it if I could get the exact components I want, but can't find a shop that will do that. I suppose I could buy everything myself and take it to a local shop for a "professional" build, but if I already have the components in hand I'll just do it myself.