I do both kinds of quilting, fmq and straightline (cross hatching and SITD). I personally think that each quilt I make will tell me what type it needs, but I also take into consideration what the recipient will like. If it is going to a man/boy, then straightline quilting seems more appropriate. But if going to a woman/girl, then the curvy type of quilting seems more desired. Quilting is an art all in its own and can be as simple or intricate as desired.