I've got a mush of an accent and it probably changes depending on who I'm talking to and what part of the world I'm sitting in when I'm speaking.
This is a funny story, well I think it is anyways. I've been here 8 years and I just got married. I invited one of my bandmates to the wedding along with his wife. I've casually known the wife for about 7 years,but it's always been the kind of five minutes after a gig kind of pleasantries exchange, (Hello, how are you?, how's your son?, how are you feeling?, etc) rather than with a full on conversation together. When she was at the wedding, she said to our mutual friends, "that was the first time she had actually realised that I was American". That made me giggle a lot! However, I do know that my accent switches and in that especially in the pleasantries exchanges, unconsciously to probably not stand out and blend in, I really can be softspoken and 'Scottish'. So most likely, in any exchange with her, I was probably just quite quiet and muted and no one ever had any need to explain to her that I was American.