And, I notice that this is something many people don't take the time to do ...
AND, when I was writing about seam finishes a few weeks ago I ran across this excellent series of pictures that explain exactly the way I was taught to trim seams. This is what I do to this day. It was hard to figure out who made this, but I finally found out it is published on the website for the East Aurora School District in Aurora, Illinois. No author is listed, but Thank You, whoever you are!
I have nothing to add ... enjoy!