My desire is simple. I'd like to build a PC that I can hook up to my TV to play a variety of Couch co-op style games on steam with my partner. Things like Gang Beasts, Worms W.M.D, Stick Fight, Etc. The ability to occasionally play something a bit more demanding like Overwatch (In comparison at least to what I'd normally be playing). The budget for this system is $500, and I was wanting it to be ITX. Both me and my partner have our own primary PCs, so no need for a high end GPU.
I'm okay with AMD or Intel, pretty agnostic in that regard.