When I lived in New England people particularly thought that the way I say “theatre” (thee-ter) and “butter” (bUHtter) were particularly striking. They pronounce theatre with the a (thee-a-ter, or thee-ar-ter) and dont emphasize u sounds much

Also Im a “mah” or “mahm” person

Honestly just in STL there are a lot of variety of dialects though, even not accounting for racial lines. Go down to Arnold and you might as well be in the bootheel