When did you build your first PC and what were the specs?
As for a fresh build from scratch it hasn't happened yet. I did frankenstein a prebuilt ACER into a full ATX gaming case with corsair 750W power supply I got for free.
Don't know all the models, but it's a 4th gen i5 with 12 gb ddr3 and 1 tb ssd. Last year I tossed in a 120 gb ssd and a rx580 4gb gpu for an upgrade