I like to pin if the seam is long. I also like to pin at any seams that need to match. I don't sew over the pins, though. I take them out just before they go under the needle.
I learned to pin, way back in Jr. High home ec class, so it may be just a habit for me. I watch Bonnie Hunter quilt on "QuiltCam" and have never seen her ever pin anything so it can be done but I prefer to pin.