I'm really quite happy of how my recent business card design came out. The jewel swirls were something else, though. Because I created the gems with so many different shapes and colors, layers, etc., the size of the file kept crashing my program (ugh). I think it's time for a new computer :) -- something that can handle processing complicated and large files.
The zebra pattern in the background and the use of gradients, combined with the jewel swirls, gives this design a sophisticated and very elegant look.