The purpose of a business card can be lost if the card is truly ugly. The customer looks at the card and is offended by the artwork and you are out of work. 
The better avenue to pursue for the business card is strictly business. The card has a purpose and don’t try to jazz it up too much. Colors are not needed and the words need to be easily legible. An ugly card will loose you business as the customer will think you are not a serious business. Dana Sibilsky has the ugliest card I have seen for a long time.