Warren G. Harding, a senator in early part of the 20th Century, was elected president almost solely because he looked "presidential." He had been a newspaper editor so he could clam some modest executive experience.
His administration is widely considered a disaster.
I prefer to elect substance and demonstrated executive competence.
Dang, looks like Mitt's out then. How about Bill Richardson? He's been more of a conservative governor than Mitt ever was anyway. At least Bill didn't ram socialized medicine down the throats of the people and tie a noose around the neck of small business in the process, then take off, leaving his party in shambles and his state with a marxist at the helm.
Jimmy Carter had this 'executive experience' that you speak of as well. That turned out really well...