Color me confused. I say that liking or disliking a game is not a matter of rationality, but rather of preferences and you essentially ask me for a rational rationale (pun intended) as to why you should like 4E? There isn't any! As I said, rationality in terms of liking a game or not can only manifest in terms of the interaction between the preferences. As such, if your preference is to continue with your current campaign without extensive conversion, it is 'rational' for you to do so. Of course, it is only 'rational' in so far as that is your overriding preference, towering over other preferences you might have that might or might not pull you away from 3E.
No. I asked you for a rational method to resolve my primary dislike of 4E. I think that we can agree (and I am making an assumption here) that there is no rational method, at this time, to resolve my primary dislike of 4E. Unless you have a method to do so, I don't think you can make a logical argument that my preference is irrational.
However, you are (as far as I can tell) starting from the premise that my dislike of 4E is irrational. That theory does not hold up under scrutiny: My dislike of 4E is directly due to a rational and reasoned analysis of the challenges using 4E creates for my particular situation. Coming to the conclusion that I do not like 4E, under these circumstances, is demonstrably NOT irrational.
Furthermore, since every decision we make is based on "preferences", your description dictates that there is no way that ANY decision can be rational. That simply does not make sense, especially in the sophistry of words you're using.
(excerpted from dictionary.com)
Rational - 1. agreeable to reason; reasonable; sensible: a rational plan for economic development.; 2. having or exercising reason, sound judgment, or good sense: a calm and rational negotiator.; 3. being in or characterized by full possession of one's reason; sane; lucid: The patient appeared perfectly rational.;... 6. proceeding or derived from reason or based on reasoning: a rational explanation.
Preference - 1. the act of preferring (preferring - 1. to set or hold before or above other persons or things in estimation; like better; choose rather than: to prefer beef to chicken.)
I "prefer" to not switch to 4E for my current campaign world, since I have conducted a rational analysis of the work required for it. Therefore, my "disklike" is "rational" - it is reasoned, reasonable, consists of sound judgement, and is sane.
Calling my dislike irrational ignores the definitions of the words.
(edited last two paragraphs for word choice)