Creditors consider character, collateral and, capacity to be most important when judging a persons creditworthiness to buy a house or car.
Character - who you are as a person, honest, true, based on reports you are able and make payments on time.
Capacity - you're ability to make the payments and understand how to.
Collateral - what you own that they could take in a form of "payment" if you don't repay your loan.