I'm not trying at this point to specialize in any particular aspect of photography so I don't want to include sample shots. I'd love to hear what you all think...
One practical comment. There is no space to write on a business card with a black background. I am not certain if this matters to you, but people often like to write a note or two on business cards.
I agree with most what's been said already. Business cards can very quickly start to look tacky, which is the last thing you want.
Personally all I really need out of a business card is info about who you are - what you do - and how to call/email you. That's it.
Just my two cents
Keep it simple and get some high quality letter-pressed business cards. It's more special. Let people know you are an artsy person that appreciates craftsmanship and understands visual design.