As you can see, my example with the flower is rather flashy. Because we've used Smart Objects, we can change the pattern in a rather quick way. Double click the Smart Object icon on one of the Layers. This will open the object in Illustrator. Now change the shape into something else, use other colors etc. Save it and close the document. Go back to Photoshop and you'll see that all Smart Objects will change to the new one. Change the color of the Color Fill. Go to Edit > Define Pattern and save your new pattern. Create as much patterns as you like, all in a rather fast and smart way :)See? This is fun. Still, make sure to use patterns like the one I made here with caution, don't overload your design, make sure there is enough breathing space. Otherwise it could be too flashy and playful... unless that's exactly what you are looking for of course.