I have a friend whose title is something like "Chief Storyteller", but it fits perfectly with his brand, which is actually more "large corporation-friendly" than you might imagine. It's part of his branding and it works really well for him.

So, to the OP, the bottom line is: what's your brand and how will your business cards fit into that? It's not just the title either, it's everything from whether you get something printed on the back to the quality of the paper used for the card. It's all related to the message you want to convey when you're first meeting a new prospect -- someone who might be your best potential prospect -- and you want to make sure that your messages don't conflict, support what you want to tell the prospect, and don't get in the way of anything you tell the prospect.