I took my husband's last name when I married. Some parts of changing are a little bit of a hassle, but it wasn't overly difficult to do. I think if for some reason my husband and I ever split, I would probably keep his name just because it's shorter and easier to spell and pronounce than my maiden name ever was

Hopefully I never actually have to decide and I'm sorry the OP is going through this.

My mom kept my dad's last name when they divorced, for the same reason a lot of other people did. My sister and I were young and she felt it would be easier on us if she just had the same last name (or herself, but she says us). Doesn't matter to me either way now.