Sometimes being a musician and having an ear for speech patterns isn't what it's cracked up to be...
My sister complains a lot, especially when we're on trips to "exotic" places, about me "talking like that." This is because I pick up accents really quickly. And I swear I'm not consciously trying to "mimic" the people around me, either.
I've been identified by different people as Canadian, British, and American. Within the U.S. I've been identified as Californian, New Jerseyite, Southern, New Yorker, Ohioan, Pennsylvania Dutch, and Arizonan. When I'm speaking Spanish, people think I learned it in Colombia.
Well, the truth of the matter is, I've only
spent time in SOME of those places. The rest of the inflection, speed, and distinction in my speech comes from exposure to people around me who express those attributes.
So here it goes:
I've lived in Delaware, Ohio, New York, back through Delaware, back to Ohio. I spent a semester in New Mexico. I have visited Canada almost every summer of my life. I had a Colombian classmate during my five years of Spanish. My family is Pennsylvania Dutch.
So all in all, my speech pattern is the sum total of my experience.

redngold