Handmade business cards are by far not the quickest and easiest to produce but they are a great way to build a personal relation with the person who receives it. Business cards can sometimes reflect the personality of the person and what great of a way to show it then to have the card designed and made by the person themselves.
Not all the cards are same and there are imperfections which I think is great. It's like as every receiver is gets a unique piece out of the collection.