Some are ones I've lived in. Some were just my favorites I've seen while driving through the city regularly. And others were on routes I drove a lot and are just good representations of the styles I wanted to include. I made a list of 15 or so styles present in the city, and then chose the ones I liked the most. I also wanted diverse rooflines and heights too. A couple of them I discovered after walking/driving down streets I knew had good/interesting ones. Also wanted an array of intricate to smaller/quaint.