I've lived in the wilderness much of my life in different parts of the country with Seminole, Ojibwa, and Kree (way north) mostly, and learned many of the old ways, many of which are lost now sadly, where I became aware of this ability. My sense of scent has payed off greatly in so many ways, as hunting and tracking ended up just being the by products...
I've smelled gas leaks in New Orleans, that nobody smelled, that Entergy said it would have leveled the block if I hadn't, and Ammonia leaks in wisconsin at work, where all could evacuate before it got really bad, which it did, My boss smelled it a bit afterwards That, and gave the order, but still nobody smelled it yet.
Bad Colognes, and perfumes I can smell for miles, as well as homeless old man piss or animal piss long before i see them. Riding the scoot, I can smell everything! houses along the way, who's smoking, what women smell like. one woman who passed me, I could smell her trail of her perfume from her rippin along to the top of the next mountain in Kentucky, where I was going down the previous, what 3 miles away... She was smokin hot too, about 30, waaay too young for the likes of me. It's amazing what you can smell on I-75.
Countless other times it has helped in one way or another, and always will... drawbacks? most people over time get used to a bad smell. Not me. when I smell something bad, it doesn't go away, or fade off. It fucking sucks! If it's a skunk, it's almost painful. Shit'll be with me for a month.
I can still smell stuff on top of the bad smell, like I normally do, it's just always there. So it's not a hindrance, I just look sour on the face all the time.