Now, I realize that beauty is--to an extent--subjective. But I was just looking at my R1200R and I noticed that other than the chrome on the exhaust, there is nothing done purely for aesthetics. Nothing. Everything is purposeful. It's engineering as art. That's typical BMW: they have a disregard for the looks of their bikes bordering on disdain.
The polar opposite is Harley where everything is about the look. If you read the descriptions of their bikes on their web page, it's all about what they look like. It's almost an afterthought that they can be ridden.
Keep in mind that I've only owned BMWs. And that's all that I probably ever will own. So I like the purposefulness and disregard for frivolity. But, from the top to the bottom of the line, I suspect that BMW comes in last in motorcycle beauty contests.