You got some right! All 60s-70s houses. Mine was split level. Decidedly middle class. However, it was smack in the Midwest and basically all the houses are about as different as houses built in that era can be. Now, the subdivision that popped up in the field next to my neighborhood in the 00s were cookie cutter 3-4 of the same houses (but sometimes the floor plans/elevations were mirrored to make it seem different haha).