It happens mostly when I carry my Hasselblad around. I had a very suspect looking person approach me in Denmark once, and he asked the question like this: "That's a Hasselblad, right? Aren't those worth like six thousand bucks (equivalent) nowadays?". I told him they're unfortunately not worth pennies anymore...

Once in the Cathedral of St Paul, Minnesota, I had an older well meaning gentleman approach me, asking: "Is that a Hasselback?"... I laughed hard inside, but kept my face as he called over his brother in law to admire the camera. Hasselback.
But I do get lots of positive comments on the Hasselblad, for sure.
Then there's the Leica. Oh goodness... I'm not sure what to think when people eye it as I carry it around on my chest, ready to shoot. Some people look like they want to steal it, and others look at it as guys look at women's chests, not looking me in the eye when they ask 'Double crank?'... hahaha
It makes for fun conversations some times, and I've met a few nice people for sure that were genuinely interested in the camera, its history, and what it's like to use them.