My sense of smell gift definitely comes from my dad. He is more annoyed by scents than grateful, imo. It seems everyone in our family except me is also annoyed with his complaints!
When I was pregnant, as many women here will attest to, my sense of smell was "off the chart" hyper-sensitive. Being a woman with a prior ability beyond most, it was sometimes too much and I would agree during pregnancy I wouldn't have said it was a gift.
One example of what I notice and others don't...If I open and cook a bag of frozen veggies, I can tell if they have a problem. There's a sort of "moldish smell" to them. It's hard to explain because other people tell me that they taste fine and they don't get sick. But that smell warns me off!