I thought about some of the qualities people might think about the Midwest and looked up maps for them. Here they are, with the Midwest indicated by that quality circled. Note I am not making claims about whether any of these qualities are good or bad, they're just things that get associated with midwesternness.
"the Midwest is flat"
"the Midwest is not diverse"
"the Midwest was a hub for the Great Migration"
"the Midwest is union states that were not the original colonies or the far west"
"the Midwest has a significant mainline protestant population" (pink ABCUSA, orange ELCA, and green UMC on this map)
"the Midwest is farmland"
"the Midwest has wet summers and dry winters"
"people in the Midwest are of primarily German, Scandinavian, and Native American ancestry"
There are lots of these kinds of things that aren't occurring to me at the moment. But just for fun let's combine these ones into a map! There's a transparent purple layer for each of the previous maps, and a black outline for places that fall into at least 5 of the 8 regions.
Maybe this is the Midwest? Probably better than my first reblog on instinct alone.