Every Vietnamese woman I’ve met has been wonderful. Young ones, old ones, really, really old ones, whatever. I have never gotten to know a Vietnamese woman whom I didn’t like very much.
I have no idea why this would be so. Maybe I’ve just been lucky.
I recently spent a couple of months in Vietnam. I had the same experience there as I have in the US. I can only assume they’re just very nice people. However, they do have a fierce streak, and the men can be extremely macho. If you want to behave like a screaming asshole, which I’ve seen one or two European visitors do, they will try to reason with you, but if you persist and it becomes past the point of no return, then look out.