Yeah I've had my fair share of comments. I had some people spit at me from an SUV when I had the roof off, and they laughed. They sped down the street, and I happened to meet them again at the next service station. They were at the next pump when I pulled in to fill up. When I got out at stared them down (being 6'2" and 115kg) they couldn't even look me in the eye... such gutless losers.
I've never had the "mid-life crisis" comments as I'm only 27. But when I get other comments I just remember that most people that have to say things like that are just jealous and would be driving a Boxster if they could