I was called out in NY for having a California accent. I asked how they knew. They said Californians speak in a sing-songy way.
Go figure.
Interesting.
I have lived back east for so long that I no longer know what kind of accent I have. Although I was born and raised in CA, I have had people in CA ask what kind of accent I have.
Despite the time I have spent away from the state, I can still tell the difference between regional variations of CA accents, where most people just vaguely discern some generic CA accent.