I’m not musical in any way, and my ear can’t always pick out the bass or often other instruments in the arrangement … but that doesn’t mean I can’t enjoy music, I just enjoy the whole. Likewise, if I’m having a nice bowl of soup or stew I don’t sit there and try to discern what herbs may be in there besides any obvious ingredients. To sit there analising what I’m eating would detract for my enjoyment of the meal. Same thing with snuffing. I pinch, I snuff, and if I like it I’ll do it (and buy it) again. So, no I can’t discern the various undertones most of the time, and quite frankly I’m not all that interested in trying. The snuff either works for me or it doesn’t 
So I was trying to google why it is so that when you go outside the scent becomes far more complex, lasts longer and is stronger but I can’t find anything. Hell, I’ll forget I took a pinch a half hour ago and walk outside and wonder why it smells like chocolate or fig newtons or vanilla lol
Any scientific evidence or something? Lol it’s so interesting it’s even got me wondering if I eat my meals outside more often I’ll enjoy the taste more!
I know we all experience it but the only thing I can think of is that the outdoors has a slightly higher oxygen content and it’s a bit more humid? Maybe?
Some have the nose and some don’t.
Besides having the nose for it, one also needs the experience of encountering individual essences and the recall ability.
If you have that, then IMAGINATION plays a big part:
In sifting through a combination of essences,
Being able to imagine what certain combinations would smell like together, and
Being able to differentiate the individual ingredients when encountered together.
I agree that getting away from the background scents that you are acclimated to is a big help.
I have been told that I have a good nose, but I could never hope to catch ALL of the undertones and aromas. Sometimes I can sniff out 3 or 4 ingredients, but never more than that.
I definitely get the going outside trick! Things really ramp up when I take a pinch than go outside, way more complex flavors shoot out!
I have also noticed that when it is cold out the scents are amazing. When I am out hiking I take huge pinches, my whole face can feel the aroma. It is honestly the most pleasant tobacco using experience possible.
My experience goes along with the guys who say outdoor snuffing in cold weather (which we get like one or two days of here a year, if that) is much more effective. Also, if you are worried about not having a good sense of smell like anything else it can develop. You just probably haven’t given it much new to work on until you started snuffing.
I consider myself to have a relatively insensitive nose. Yet I can smell what food people brought up in the elevator and all kinds of things that have people around me baffled. I was never that way until I started taking snuff. The other day we got some new snuff to try from one of our friends. I was the only one who knew right away what he flavored it with. The other guys don’t use snuff very much so they just didn’t have the sensitivity.
I still don’t think my sense of smell is as refined as many of you but I know it has gotten much better since I started snuffing so just don’t worry, hang in there, and it will certainly improve as times goes by.
I’ve read comments about concerns in losing one’s sense of smell due to smoking for many years. I know we’re all different but I wanted to share my experience anyway because it’s postive & goes against conventional wisdom.
I am frequently amazed at how good my sense of smell is now, and I’m 2 years smoke free after having smoked for over 30 years. Now I easily detect scents I couldn’t all those years I smoked. I also notice very subtle scents even if they’re far away from me. It’s incredible. All this is to say there’s hope. I bet there’s even scientific research to back this sort of thing up but we’ll never see it because it goes against propaganda!