Well, because I am a new quilter, I have to rely on seeing photos and patterns for blocks as I don't have the experience to draw from to be able to visualize an entire quilt.
Having said that, I never copy anything exactly. Always want to pick the colors and design that says ME. So even if I am following a pattern for a guide, I will almost always make changes.
I am about to try my hand at creating an original wall hanging around a panel. But even with that, I will be using square designs that are someone else's. How I make them and put them together tho, will be all me!!!