Single Last Name Syndrome

I have nothing against Hillary Clinton. Honestly, from what I can ascertain she was responsible for most of the good things that happened during Bill's reign. I am also very attracted to the idea of a female president. But why do we keep electing people with the same last name? Didn't the Bushes teach us anything? Ok, so perhaps I'm being unfair in comparing the situations. Why Bush 2 got in at all is beyond my mind, especially knowing how bad Bush 1 was. I can see why people would vote for Hillary and she isn't tainted by parentage by imbecile. But I do think that its important to mix up the political gene pool and get some different backgrounds in there. At least pull me out of Texas.