The two situations in which I do alter my dreams are if I’m being assaulted by actual other entities (rare, but it happens), and other times I will let a particularly rich dream play to the end, and then I will rework the ending in several different ways to see what that yields, in terms of insight, not enjoyment.
What’s really amusing is that, after enlightenment, you don’t like any part of the dream, neither do you dislike any part of the dream. Liking and disliking just don’t happen. Then after a while, if you’re not just a silly spiritual nutter, you get really bored of that, and so you choose to like or dislike parts of the dream…because it’s amusing, and yet…you know it really doesn’t matter, and you are at liberty…it’s a choice, not a reaction.
Unless, of course, you’re being tortured. Even silly spiritual people will eventually admit to disliking that part of the dream.