What kind of business are you in and how do you distribute your business cards? In my business, I hand them out very sparingly and since that is the case, I opted to go for more expensive clear lexan cards that one of my clients had made for me. I get compliments for days on them, but at the end of the day it's all about being remembered.
Also, people tend to keep plastic cards more often than a normal paper card.
I'm extremely picky about making sure that when I do hand over contact information to someone, that I make the best impact possible. First impressions only happen once...