My kids will have my last name. In my case, it also happens to be my husband's last name, but I only took his name because I hated my old last name and, long story short, his last name is what I wanted to change mine to anyway before I even met him (totally of those "must be fate" moments

). I don't personally care about what's traditional, and since mom will almost definitely be the primary caregiver, together or not, it makes more sense to me for her kids to have her name.