Is three a crowd?? Because I agree. I also alternate them because I want my seams to "fit together". Less bulk = easier to quilt !! The old saying is to press to the dark so the seam won't show but there are exceptions to every rule. Remember the I before E except after C?? The reason it use to be unpopular to press seams open is because batting would beard thru the open seam and let me tell you, THAT is something you don't want to deal with. Battings have fortunately improved since the dark ages of quilting during the 70s. ;-)