I feel it would be letting go of my identity/culture, to change my last name. Also, I am French-Canadian, and in my culture we tend to keep our own last names (although not everyone does!), to the extent that in Québec (Canada's mainly francophone province), you are not allowed to change last names just because you get married. The THIRD reason is that while my last name is French, his is Flemish and no one knows how to pronounce it. The FOURTH reason is that because of my profession, it is impossible at this point to change my name. So my solution is to just add his last name to my "official" name (which is long to start off with, having 2 middle names, my first name and last name!), and keep all my current ID/certificates/etc... That way, when we have kids, we'll all share the same last name and I get to keep mine which will remain the most used one for myself. He's happy with that now, after much discussion, since initially he was disappointed that I would not give up my name althogether.