It's entirely personal preference. I helped my guild tie a quilt once, and I did not enjoy the experience (it was hard on my back and fingers). I do enjoy quilting them, both on the DSM and on the lonagrm, and I prefer that look. I don't know of anyone who thinks that all quilts have to be quilted. (Although many shows will not accept tied quilts.) We see a number of quilts on the board that have been tied. Do what you like.