Some people are able to determine between the delicate flavors. like the wine guys, I've tried with wine but i don't drink wine all day every day and don't try 1000's of manufactures and grape growing techniques. working at the shop was a big eye opener to me. I've smoked my whole life not really understanding anything about the plant until now a days. like terpenes and all that jazz. i still don't even close to totally understand it but somewhere a long the line my nose started picking up all the little differences in everyones tree. i quit smoking cigs about 5 years ago now too about the same time all the flavors really started to come out. I've heard cigs can effect what your taste buds pick up?
i have no idea why I'm able to place all the little differences i think it probably has something to do with being a synaesthete (some one with synesthesia) smells have colors and sounds, and sounds have colors, and taste have sounds and colors, and colors have tastes, and there is a lot of deep emotion behind it all. had it since i was little and i really don't know if its weird or what i don't know any other way i guess so its just normal to me. they say a lot of people are probably synaesthetes and don't really know it. like kanye west is suspected to be one. when he was a kid he painted a lot of pictures of what "Music looks like to me in my head" and i could see a lot of familiarity with what i see with music as well.
I've even read that we are all synaesthetes when we begin life but over time depending on which parts of the brain gets used the most, different attributes develop. others fall by the wayside. i personally have many many shortcomings but i try every day to make up for them with whatever few things I excel at!