I have made my own quilt patterns , and I have purchased patterns that I could have made myself easily. Sometimes I just want it easy! I have EQ, but still use the tried and true graph paper when I am not in the mood to spend one more minute looking at a computer screen.
Some of the quilts I liked to best were ones that had elements of several patterns.
Its a hobby.. right?! Do what you like, and leave the other stuff to people who like that part of quilting.