Kept mine.
1. Didn't like his
2. Didn't really care to go through all the paperwork
3. Saw what my mom went through to change hers back after her divorce
It is such a pain in the butt to change it back! I have seen this firsthand, I worked in a job at one time where I supervised people doing the name changes for customers. Such a hassle to get back to your maiden name back!!!
I kept mine:
1. My marriage license actually says my name would be hubby's, but I never changed it due to laziness and a big relocation at the time.
2. I wouldn't mind hyphenating, but our last names rhyme. No thanks!
3. Hubby's last name actually sounds really good with my first name, but again laziness.
4. I am proud of my ethnicity and like having a last name that represents my roots. Hubby is also a euro mix, but his last name isn't from a country that my ancestors came from. If he had a last name of my predominant ethnicity, I would have been more likely to change mine.
5. I thought about changing it, but had like 5 years left on my passport when we got married.
6. I don't think my husband cares too much if my name is changed or not.