I do both. Whatever the seams wants to do is how I press it. Sometimes I don't off set, sometimes I have opposite seams on both ends. I let the seam twist in the middle. I've never had a problem with machine quilting no matter how the seams are pressed. I haven't noticed any needle holes or skipped stitches. I do stitch in the ditch with open seams. No one has ever said I noticed you did SITD with open seams, even in judged shows. I guess it's what you do with what you have the way you want to do it.