Giving people a reason to hold your business card is a huge way to get them to actually read and remember the business you are trying to sell to them. Adding 'depth' to your card, giving it an eye-catching design, or in this case actual tactile texture can be just the thing to make them hold on to the card you're handing out.
Letterpress, although it adds a slight price increase, can add a lot more to the way someone views your business. Check out these examples...
Using a letterpress technique can add a high end and distinctive feel to the card you're handing out, giving you an impressive visual identity. Handing out a business card usually wraps up the first impression you give someone, so whether its a future client or employer, or someone with no other use then to add word of mouth praise to your work, use your new fancy cards to place a spotlight on what you have to offer!
source: http://designmodo.com/