So, I'm from Seattle, basically, and for the longest time I thought no, I do not have an accent.

Then I learned that the reason I thought that was because well, the accent I have is basically the least distinct from the 'General American English' or 'Region Indistinct American' accent, out of all other regional accents....

With that 'General American' accent being what nationwide newscasters, voice actors and movie stars either developed on their own, or were trained into, for being easily intelligible to any other American accent/dialect speaker, or as just sort of a rounded approximation of 'American', with no specified regionality to the character.

Thats not to say the PNW or Cali or just general US West accents are all exactly the same as 'General American'... they are not... its just that they are the least difficult to understand from a general audience perspective out of other regional US accents/dialects... or at least that is the explanation I've heard.

As I am aware, the main difference between PNW/Cali English and other US regions is that we have completed the cot-caught merger. Absolutely no difference in pronunciation, the verb sounds are the same... whereas in much of the rest of the US, these are different, distinct vowel sounds. We just use the 'cot' pronounciation for both.

Bot cot thot slot thought caught fraught not spot dot.

All the same. No rolling or bending of the first vowel into the u to make a more complex vowel sound, all just 'bot' or 'dot'.

That and pop vs soda vs coke.

For whatever reason, I usually say soda, but that did make me an oddball of most people around me near Seattle saying 'pop'... but a lot of other places in the US use soda, but also a lot of other places use 'coke' to refer to any ... soft drink... which confuses and aggrevates my Autistic brain lol.

...

There are a few things that I remember being distinct to Californian accents/dialects as compared to Seattle:

One is the rising tone at the end of the sentence... thing.

I always called this a valley girl accent, and this is because no one I knew as a kid spoke that way... unless their family had recently moved north, from Cali.

Now though, it is more common generally in the PNW, at least in my own experience.... but also that could literally be because a lot of Californians have migrated north.

Another silly, but super easy tell someone isn't from Seattle: Their accent may be essentially indistinguishable from a PNW accent... but they always, always refer to I-5, as 'the 5'... instead of 'eye-five'.

No one born and raised near Seattle does this.

I-5 is the main highway that goes all the way down from Vancouver BC, through Seattle, Portland, San Fran, LA, and runs through all of those cities, so its a major reference point of conversation in all those places.

And yeah, the regional vocab difference for how people refer to it is an example of a difference.