One point not mentioned above (all of which are valid IMHO):
With education (e.g. via pipesmagazine.com) your palate has become more sophisticated.
I know that mine has become more discerning, than at any point in the previous 30+ years I have smoked a pipe.
I knew what I liked (brand wise), but I didn't know why, or what the components of those blends actually were.
In learning about each component, and how they interact as described in the review process combined with the opinions of others... A pipe smoker could be and probably is influenced to try something new, and actively look for an aspect of the tobacco (flavor, blend, casing, topping, processes, etc.) that appeals to that individual.
Also with that knowledge, the increased discerning of flavors is an influence on preference.
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