I really love needle punch. When we were in Maine I started playing around with the different types of wool yarn that I have a lot of in my stash. Shown here is crewel yarn, yarn from England (white band solid green color) and my own which is in balls. I mixed them into my current project and really liked the different textures they and look they gave my design. Biggest problem was adjusting the yarn height so it blended. I still like mine best because it is variegated-ish and I love the dimension it adds to my pieces.
Many use cotton floss used most commonly in embroidery work. I really like the way wool looks and feels. I also think that wool will stand the test of time and hold its color and shape.