Thanks
I press open because that way I never have to worry about flipping them by accident, which was an issue for me (I often use many fabrics of similar value, so there's no "press towards the darker fabric" option). They're all always open unless there's a specific reason not to.
I'm pretty sure that "you're going to have hundreds, if not thousands, of tiny seams to iron at the end of this project" should have been a specific reason not to use open seams... but hindsight is 20:20.