Around this part of the woods, a MTB is the choice for
most. Low end Walmarts for the most part. I see dozens
every day, bike racks are full of them.

Does it really matter? You are riding and not burning gas
and getting in better shape.

I ride for fun and fitness, streets and paved trails, and
ride a Schwinn Aluminum Comp. With slicks. It has never
seen dirt, or grass or gravel.