I had a friend who threw himself a little man from time to time.
He told me that a person's age, the presence of bad habits and, in general, the lifestyle in general, greatly affects the taste of meat, yes. As for nationality and religion, these are the things that sometimes determine the way of life, so they can also be taken into account.
Are you talking about the taste of human flesh? It is so obvious that the taste of meat is determined by diet and lifestyle. A pig fed on acorns is much tastier than the one that fed on slops, and a person from a pig, and from other mammals, in this regard, does not differ much.