For women, I have always, always been attracted to foreigners. American women generally bore me and their way of speaking doesn't help.
The most annoying accent on a woman, in my opinion, is the New England accent; more specifically the Boston or Baltimore accent. I find the accents to be quite annoying to begin with, but not so much for a man as a woman. They don't carry the least bit of sex appeal or intrigue. The most attractive US accent for a woman to me is the Deep South accent. That Southern twang is like music from a woman's lips. Although generally speaking it doesn't tend to make one sound very intelligent. But still, even that accent is lacking in my opinion.
On the other hand, I absolutely adore my Hispanic wife's accent!!! I love the way Hispanics talk, especially when they speak English.
But I think the most attractive accent for a woman is... well, I'm torn. It's a tie between the English accent (sophisticated and pleasant-sounding) and the Russian accent (it's just downright sexy for a woman).
Your favorites and least favorites?