I did about a year after we got married simply because my parents are very traditional and thought that I wasn't showing enough commitment to my husband by not changing it. DH didn't care one way or the other. I regret doing it though simply because I don't feel connected to my IL's at all and that last name and my new name (that I've had now for 2 years) still doesn't feel like my name, you know? In fact, DH still calls me by my old last name!

What about you?