I'm not British so I didn't change my name when I got married, because it's just not in my culture. Now a secret part of me wishes I had, because I wouldn't spend so much time spelling a furriner, double barrelled surname every time I deal with an utility company on the phone.
Which leads me to my rant of the day: when people notice my accent and ask me where I come from. I want to tell them "London", and watch them try to figure it out. I've been here for twenty years, I'm as British as I am , and frankly, and this point I'm not interested in telling you if I miss my country, it's weather, or how often I get to see my family.
In fairness, people are just trying to be polite and make small talk, but it don't know, some days it just gets to me to the point that I've even considered taking accent-removing speech lessons.