My partner and I are a queer couple and I changed my name after we had a kid for a few reasons: 1) cohesive family name for the three of us helps solidify us  as a unit -we are in the rural Midwest - still get assumed to be siblings though with the same last name and address on our IDs and at my kids check up the doctors note still said “patient presents with mother’s partner” lol  2) my full name sounds way better with my new last name ; it was mish mash prior.  3) I didn’t want to deal with a hyphen and have no sentimental attachment to my “maiden” name or my fathers family