Ohhh...I'm new here. I voted 'other' and see that I'm the first to do so.
I have my partner's name despite the fact he and I aren't technically married. We did talk about getting married about 17 years ago and decided not to because we couldn't agree on how to do it. (here in Australia, we have legal recognition, so marriage isn't so important) We renovated a bathroom with the money instead.
Anyway, I was still antsy and finally figured out that the problem was the 'name' thing. He and our kids had his name and my name was still that of my ex husband. If it had been my maiden name, I would have been Ok...but the name I had no longer had relevance to me. Going backwards to my maiden name seemed silly after such a long time, so I had my name legally changed to that of my partner and our kids.
I said yes, but not necessarily "of course." I did not change my name the first time I was married.
I have taken his name socially this time around, but have not done any of the paperwork yet to change it. I plan to! Just got married 2 weeks ago!
Even in California, I don't know that you had to file "change of name" paperwork but you still have to notify businesses and agencies that have you on file under your maiden name. Social Security, driver's license, credit cards, bank accounts...all accepted a copy of the marriage certificate but it still took steps to do it.