Really interesting business cards, simply cannot look like a business card, and the direct communication features (contact details) are secondary.
If a business card can delight people who receive it, then it has a point.
In this epoch, if sharing contact details requires a hardcopy, I'm of the opinion that it's of very limited value. Although it's useful to have business cards for many locales, since they are a customary item. (In many parts of Asia, it's essential)
So, if a card can communicate some meta information (sense of creativity, problem solving, good humor etc.) That's going to have value. It will create an interesting memory.
I think it's worth having a few designs made, but it's a matter of ROI.
If you think you need a business card, think about why, where and who they are for.