Is Romney credible?

I don't know about you but I don't like the look or sound of the Republican candidate for the White House, Mitt Romney. There is something not quite right about him, a notion confirmed by his response to the Obama accusations, aired on TV, that he was the Chief Executive of a company that didn't favour American workers. Am I alone in thinking that he lacks credibility or is it just the fact that he was/is an investment banker that colours my judgement.