A
person that spends a keen amount of attention and energy on knowing the ingredients of their liquor, the proper preparation of cocktails and finds great enjoyment in
top-
notch ingredients and exemplary preparation in addition to back story and knowing the brewers, distillers and bartenders who create those drinks.
A libationist is not necessarily a drink snob, only enjoying specialty and/or liquor items difficult to obtain and/or expensive drinks; though, that is a variety of libationist and probably the most common or at least easy to spot in a
bar.