Notice this... as soon as you exchange cards with a prospect, he/she will be looking at it - judging it - and since most of us will judge things by what we see (consciously or unconsciously), it is imperative that your primary marketing tools portray professionalism and high quality. Moreover, efforts put towards your card design, will give your customers a sense of how much attention is brought to your products and services, AND how serious you are about what you do.