IMO, feminist ideals aside, the best thing about DH and I keeping our own names is the way you can honestly get rid of telemarketers.  "Mrs. X?"  "No, I'm sorry, there's no one here by that name."  Once someone even persisted with, "Um, the future Mrs. X?"  I said, "sorry, wrong again, no one here by that name" and they  apologized and hung up.  

The worst thing is that it's never simple.  But we can live with that.