My wife prefers to not eat strawberries. The fact that she's deathly allergic to strawberries (as in, "I cannot breathe and may die if I don't get medication") doesn't stand as a logical reason for that preference?
Well, as it happens I incline towards a fairly reductionist/empiricist account of preference. So I'm happy with the idea that preferences are (in some sense) emotive. (My feelng is that the majority of contemporary philosophers of mind and action don' share this view - various forms of rationalism are currently enjoying a resurgence. In any event, whatever the precise balance of opinion, it's a matter of controversy among those who spend the greatest amount of time and effort reflecting on the issue.)Either not dying is more than a preference (and your point is invalid), or it is a preference (and there is no rational reason to prefer continued existance over dying).
Preferences are emotive.
But I think the case of Umbran's wife shows that not all preferences are therefore unconstrained by reason. Assuming that Umbran's wife, for example, has a preference to live (as most of us do) then it is rational for her to cultivate an aversion to strawberries. This doesn't tend to show that preferences aren't emotive (in the relative sense) - rather, it shows that the contents of emotional states are subject to reason (at a minimum, constraints of consistency).
Which is, to an extent at least, relevant to the current discussion. A GM who simply says "I don't like it" and doesn't try to locate that preference in some deeper, consistent aesthetic vision of the game, is perhaps not doing everything that might be done to show that his/her preference fits rationally within his/her overall system of preferences.
any expectation that a person must (or even should) explain his or her preferences to you....so that you can decide if they are valid or not, or maybe convince him to change his mind.....is not polite. It is off the edge of rude and into the realm of offensive.
Well, on this one I'm inclined to agree with Umbran. If one is talking about very brute preferences that are mere matters of taste - do I prefer chocolate or peanut butter?, for example - than there may be little point in talking about it, but equally it often may not be very rude to suggest the plausibility, even superiority, of an alternative preference ordering (though it would of course be rude to badger excessively). After all, little is at stake here.Neither one has to, no. Put it is kind of polite to do so, and may lead to constructive discussion or compromise.
But once we get to more complex aesthetic judgement, which can be expected to have content that overlaps with other complex judgements, such that questions of overall coherence arise, then (i) discussion may help bring these relationships to light, perhaps altering judgements in the process, and (ii) (in my view, and provided one is civil about the whole thing) it is unexceptional to raise the issue as a topic of conversation.
For example, if someone tells me that s/he prefers Doug Niles' Darkwalker on Moonshae to Graham Greene's The End of the Affair as a work of literature, I'd expect to be given at least some sort of reason, just as I am ready to give reasons to justify some of my more idiosyncratic aesthetic judgements.