Left vs. Right in Gounod's Faust

As I was watching Gounod's Faust, I noticed that Mephisto wears his cloak over the right shoulder. I studied Latin for several years during high school and, during that time, we learned that Romans would wear their cloaks (or whatever other drapery they were wearing) over their left shoulders because to them, the right side was the "good" side, and therefore the left side was bad or "evil" and should be covered. (Though it was still developing, this was most certainly furthered by, if not started by, Christianity, which places Christ at the right hand of God, indicating good). In addition, the Latin word for "left" is "sinister"-- sound familiar? This is indeed the root for the modern English equivalent.