As a Western Canadian (who works with a lot of folks in California, Oregon and Colorado) one thing that gets pointed out all the time is my pronunciation of:
Yup. Canadians often pronounce "a" as "ah" vs. "awh". A great is example of the Mazda brand. It's mahz-dah in Canada, but moz-duh in the US. Even the commercials pronounce it differently in each country.