I don't see the point in having more than one race, nor other character customization options either. What could I gain from dying my hair green or making my skin pale?
You might have made a decent point if names weren't always unique, unlike race and character customization. The more customization we have in terms of how our characters look the less likely we are to run into an exact copy of ourselves. But No matter what, whether we have surnames or not, we'll never
run into someone with the same name as us. I know you were just trying to prove a point... better luck next time.
And in regards to the actual topic, I personally don't want surnames and hope I'm not forced to have one. If other people want them (and don't use them to make their names lame puns or adjective+word combinations (i.e. Dark Warrior, Shadow Hunter, etc.)) then that's fine with me.