So, NYT put out this online quiz some years ago and it's actually a pretty fun party game to play, and see where everyone's dialect really comes from.
https://www.nytimes.com/interactive/2014/upshot/dialect-quiz-map.html
I consistently get pinpointed exactly where I am from. It's surprisingly accurate. Santa Rosa, Stockton, and Sacramento are all equidistant to where I was born and raised, and the hot spot around Northern California and Northern Nevada makes a ton of sense, given that's where Ive spent most of my life.
It also shows you where you're least similar. Southerners, and Philadelphians, I talk nothing like you.
Take the quiz, and screenshot your dialect.
https://www.nytimes.com/interactive/2014/upshot/dialect-quiz-map.html