At this stage in the election cycle, you need to stop thinking in terms of voting for a "person." One person, no matter who they are or what their background, serving 4-8 years as President, will not make or break our country. A single person, even the President, doesn't have that much power.
What you need to think about is the overall philosophy of the political party to which the candidate belongs. Sure, the President leads his party, but he (alone) won't take it far from its core philosophy. And he won't get very much accomplished without the help of his fellow party members in the Senate and House.
So, the choice is not: Bush v Kerry. The choice is Republican v Democrat.
Do you want lower taxes and more self-reliance or higher taxes and larger government programs?
Do you want a strong national defense that's respected (feared) or be dependent on the UN?
Would you rather have our troops (God bless them all) in Iraqi fighting terrorist or have the terrorist in US cities?
These are just a few of many, many issues you need to consider. Then look at the parties, not the men, to see which side is most alligned with you.