I was taught, and still do it the same way - cut 2-1/4 or 2-1/2, fold in half lengthwise and press. Sew down to the top with 1/4" or better. Then I press the binding outward giving the front of the binding a good crisp laydown effect. Like someone else said, when you roll to the back, be sure and make sure all the binding has batting inside for a nice rolled edge and not a "flat" effect.
Now you have plenty of thoughts to choose from!
Helen in VA