Personally, I would not be interested in a woman who felt like she needed to keep her last name. I think that displays too much type-A behavior and there is only room for one type A in a relationship(I being the other type A). But I would support a couple who chose to go with the woman's last name.
Really, there should be a new rule made that isnt gender specific. I propose, Whoever is the main breadwinner in the relationship should use their name. So if you are a woman, and want to keep your last name- go on the search for a trophy stay at home type man (or school teacher)... then everything is solved
But I absolutely LOATH people who hyphenate their names because they can't figure out what to do. Because of their lack of ability to communicate effectively before marriage and make a decision they make the GENERAL PUBLIC suffer by having us pronounce extremely long last names. It is not only inefficient, but also pretentious. What makes you feel like you are so important that people need to garbble out MULTIPLE last names to greet you formally. And then the children being at school, having to explain why mommy and daddy have different names- the whole thing is a mess.
Just choose a name (for the entire family), and stick to it!