All three! For the aforesaid reasons, but mostly, because you want to, right?
Besides, you don't want to keep changing your name. It's interesting but a bit too revealing when you can trace the marital history of Female Senior Scholar through the names on her pubs -- first XY, then XYZ, the XZ, then back to XY... not that you'll get divorced, of course (mazel tov!) but why should women have to go through this?
Been there, done that. Enough reason to stick with one name combination regardless of marital status, for sure.
Another thought -- in Europe, it's common to use the father's and mother's surname, and then the husband's, so it becomes quite complex. Scholars will use both last names, or one (either one), or switch the order... usually it's pretty consistent, but not always. If they can do it, why can't you?
I don't think this is common throughout Europe, but it is in Spanish-speaking places that I know of. Most of my Spanish colleagues do this. So do most of the Spanish professional cyclists. :o)
My undergrad diploma has not only my middle name spelled out, but also my confirmation name. After all, every good (pretentious) scholar has at least four names, right? Or better yet, three initials and a last name? I so need to do this for my doctoral diploma...
Well, there's the only argument I can think of for taking my fiance's name (somehow or other). I'll have 3 initials to legitimately use!