Despite being raised 'down south', I think I'm neutral, but my dad is kinda Northern-sounding. My grandma says he had a hilariously thick Boston accent when they lived there (he was an elementary schooler).
Funny how quick little kids pick up on voices. I know these two twin boys, Cole and Quinn, who moved to London for some years. When they came back (a few months ago), they both had notable British twangs, but their mom was still neutral as ever.