I do think everyone should have the right to chose, and probably just under half the married women I know have kept their own surname. I also know a few couples who have chosen to hyphenate or rearrange/combine both their names, and one man who opted to take his new wife's name.
The bit that bother's me is the number of married women I know who say something like "I was going to keep my own surname, but my DH was really upset/insulted/stubborn and said that he wouldn't feel married/there was no point in getting married". I know lots of women who I've heard saying such a thing.
I also know quite a few families who have ended up with odd combinations of names, often following divorce.
I have one friend who has been married 4 times (understandable in the way things turned out, in case anyone is thinking
), she took her husband's name each time, and has 4 children from the first three marriages.
She is now married to a wonderful man and he's a keeper. She has his surname, but she recently (and very wistfully) told me that she finds it hard.
Her DC1 and DC2 have one surname (their father, who the whole family stay in contact with); DC3 has another surname (from father DH2, who DC3 sees very occasionally); DC4 has yet another surname (from father DH3, who no-one sees); my friend and DH4 have even yet another surname (DH4's); and no-one has my friend's own surname!
An unusual situation, perhaps, but wouldn't it have been better if she (and her DCs) had all had her name all the way through.