I recently finished up a batch of 12 cards for an upcoming class using a box of 50 DCWV cards. This box comes loaded with 50 cards in perhaps eight different patterns, plus envelopes, too. Here are a couple of my favorites from the set.
The great thing about using these pre-made card bases is that the color/pattern is already there for you. You don't need to cut up your cardstock or your (hoarded) patterned paper! All you have to do is add your own embellishments in any theme you wish. Quick and easy!