Changing names

There's no reason to want her to take your last name other than a sense of ownership, as harsh as that may sound - it's a control/dominance thing. What does it change in your life or relationship if her last name isn't changed to yours? You love her as Nguyen now, I don't see why you wouldn't afterwards. If it matters that much to her, don't press the issue, as it really shouldn't be such a big deal to you. I agree with the above suggestion of combining names as a nice compromise, but it's also possible to keep your original names without changing either. I've known friends of my parents who have done just that.

I'd see it more as a sign of union, a sign that you're ready to start a new family/life with that person.

I didn't press it, and I won't, because if she's really that assertive about it, I'm not going to win.

Women.

CoB, yep, my mom's name is hyphenated. Thought about it. There is plenty of options, anywho.
P.S. - You typo'd Nguyen.