Nice combination! Can you see the scratches when the screen is on?
I wear mine the same way. In addition to the reasons you mentioned, I find it more natural to use my thumb on the crown and my forefinger on the screen rather than the other way around.And the photo isn't upside down, btw. I've been wearing my watch on my left wrist with the crown on the left for the past 2 years. In this configuration I don't accidentally click the crown when I exercise and the microphone is better positioned at an upward angle to my mouth.