I never worry about it.
Most of the time I start out a sketch (2D) from a 3D perspective as I live in a 3D world and that is how I think. (in fact it irritates me when Inventor swings around to a parallel view when starting a sketch and I have to nudge my Space Navigator to get back into a 3D perspective on what I am modeling.)
Once I have a few enitties I might clcik on the glass cube and rotate if needed to finish up the sketch from a 2D perspective.
Functionally, I agree with you.
In IV we don't care either, because it is too cumbersome to control.
But, in ProE, where the company owner/head engineer will review your work, and he wants up to be up in each sketch, we care. He signs the paychecks.
But, in ProE,
Show him Ctrl Wheel in Pro.
My sketch is going to be oriented correctly relative to the rest of the model - no matter what plane I select as Reference.
One possibility is to have a customized part template with two additional workplanes (named, say, "my XZ Plane", "my YZ Plane").
To cretae "my XZ Plane", first create a sketch using the "XZ Plane". Then using the "Line" command first pick the origin point (point A), then pick a second point (point B) so that AB is vertical. Note that AB is parallel to the Z axis. Pick a third point (point C) so that C is to the left of line AB. Now create a workplane based on 3 pounts and pick the points A, B, C in that order. Rename this workplane as "my XZ Plane". DElete the sketch you created earlier without deleting the dependent workplane. You could create "my YZ Plane" similarly.
Any sketch based on these workplanes will be oriented the way you desired.
Save this part file in the template folder with an appropriate name.