When I married, I kept my last name. I did so mainly because I was a reporter at the time and all of my clips and contacts knew me by my maiden name.
It's been six years and I have not changed my name. To those considering not changing--it has caused me innumerable headaches over the years. Society really doesn't embrace this choice and, I've found, some people actually seem to get very upset when they learn I kept my maiden name (especially here in Georgia), though I have a hard time understanding why they care so much.
Jen