I was born in Los Angeles where I still live. I've had a lot of people who thought I was either from Iowa or Nebraska and were surprised when I said LA.
I've had my nose broken twice so my voice is nasally. My father also was hard of hearing so I bite my words off kinda hard, even still long after he died. I also am the type of White guy that may look like a farm boy. Those are the only reasons I can think of.