It's a fascinating question, because if you think about it, the idea that you would CHOOSE to live a certain place is sort of a recent development. For most of human history, you lived and died generally where you were born, and only the wealthy had the luxury of long trips to explore other options.
Like most developments in human advancement, what the rich get first the poor get later. Eventually the ability to choose to live a particular place (because you have enough margin against survival) became a real question.
I ended up in Indiana because that's where the job was. It was sort of a throwback to the old days where you went where the work was. I'm thankful that the job led me here. Winters and summers are both quite tolerable (the pollen less so).
The state itself suits me well enough-- nothing too crazy politically with just the occasional shenanigans. Reasonable governance, reasonable weather, reasonable cost of living (housing, energy, etc).
What I particularly like about being in this part of Indiana:
-- It's easy to get to other places. Chicago is 4.5 hours, Cincy is 1.5 hours, Louisville an hour, Indy an hour.
-- Indiana MAKES THINGS. Just last week, I toured no fewer than 4 different suppliers who have amazing manufacturing ability-- bleeding edge 3D printing, sand casting (including 3d printed core molding), sheet metal fabrication, water jet/Plasma CNC, bending brakes, robotic welding, 5, 6, and even 7 axis CNC machining centers, you name it. Indiana manufacturing is one of the coolest things about living here.