I usually press all my seams open as well. Having been doing this for years. I honestly feel I get more accurate piecing this way vs 'nesting' as well. I can stab exactly in the middle of a seam to match up the next piece instead of being next to the seam for stabbing/matching purposes. And I've yet to have an issue with any of my quilts as far as I know due to the seams being pressed open. Also makes for much flatter blocks in general as well as those that have multiple seams meeting in the center. Much less bulk to deal with.
Only exception is paper piecing. I just never think about pressing those seams open after I trim.