If you're SID, make sure you outline all the important components so it looks "finished". Some blocks outlined and not others will make the unquilted parts stick out. When I FM, I use the width of my hand as a guide. That to me is the farthest apart it should be quilted to look right. And it depends whether you're doing a bed quilt or wall quilt. More quilting makes it stiffer and not so cuddly, so you might want to reserve the tight qulting for the wall - or tablerunners/placemats.