well, I still mostly press to one side as I really truly like the way pressing them in opposite directions where the seams intersect is much easier and accurate then pressing them open. Gotta have the top seam edge pointing towards the back so it locks better. Open or doing this, you still have the same amount of fabric on each side of the seam. I will occasionally press open if that is what works better. I am not opposed to pressing toward the light side when it makes sense nor am I opposed to flipping a seam in the opposite direction when it makes sense. Yes, that leaves a little twist in the seam if both ends of the seam are pressed in the opposite direction but I give it a little press and it is just fine. I never ad problems with quilting it because of seams. I do confess to really disliking pinning. I find that pressing seams open requires more care and pinning so the seams intersections line up. This is just a bit more fussing and time consuming to me. However, I do not make many art quilts and never have done a show quilt. I just make quilts meant to be used and thrown in a washer and yes, even a dryer. I don't think there is right or wrong answer, just what works for you and the particular project.