I was on the fence for a long time, since I'd spent a good chunk of my professional career using XH's name.
The thing that finally pushed me over the edge was that I got tired of the conversation: "That's an interesting surname! Where does it come from?" "India." "Oh! Is your father Indian?!" "No, my ex-husband is." ...awkward silence...
LOL After XH and I divorced, but I still had his name, I'd occasionally run into someone asking if I was related to so-and-so. I also got the awkward silence when I explained that it was actually my divorced name. I wonder if it was so awkward because I was so HAPPY to be divorced.