Economic: I cited Asimov on the previous post, so let's stick with that. The Computer effectively runs a planned economy, using massive information-gathering and computing power to overcome the Hayekian knowledge problem. It really does know what is best. Everyone is free to listen to The Computer or not, but you know that your decision would be less efficient for accomplishing your goals. Such rebellions are useless, however, because The Computer's prediction capabilities include whether or not you will take its advice, and it acts accordingly to make sure you get the best results anyway.
Sexual: With no need for biological reproduction, the sex drive is eliminated in favor of other interests. Some people continue to have sex; as a hobby, it has a public reputation somewhere between (the current view of) Civil War re-enactments and juggling.
Governmental: Initiation of violence is the chief rule. With powerful AI and ubiquitous nanotech, it is recognized that anyone can inflict his will upon a large area in a short time. Pre-emptive execution of possibly unfriendly biologicals is the major task of government.
I was about to post your sexual weirdtopia. To me, it doesn't even seem that weird, just... efficient.
But then, I often want sex, but I rarely enjoy it. So a world where no-one has a sex-drive, sex is just a fun thing to do, seems exceedingly attractive.
Utopia and Dystopia have something in common: they both confirm the moral sensibilities you started with. Whether the world is a libertarian utopia of the non-initiation of violence and everyone free to start their own business, or a hellish dystopia of government regulation and intrusion—you might like to find yourself in the first, and hate to find yourself in the second; but either way you nod and say, "Guess I was right all along."
So as an exercise in creativity, try writing them down side by side: Utopia, Dystopia, and Weirdtopia. The zig, the zag and the zog.
I'll start off with a worked example for public understanding of science:
Disclaimer 1: Not every sensibility we have is necessarily wrong. Originality is a goal of literature, not science; sometimes it's better to be right than to be new. But there are also such things as cached thoughts. At least in my own case, it turned out that trying to invent a world that went outside my pre-existing sensibilities, did me a world of good.
Disclaimer 2: This method is not universal: Not all interesting ideas fit this mold, and not all ideas that fit this mold are good ones. Still, it seems like an interesting technique.
If you're trying to write science fiction (where originality is a legitimate goal), then you can write down anything nonobvious for Weirdtopia, and you're done.
If you're trying to do Fun Theory, you have to come up with a Weirdtopia that's at least arguably-better than Utopia. This is harder but also directs you to more interesting regions of the answer space.
If you can make all your answers coherent with each other, you'll have quite a story setting on your hands. (Hope you know how to handle characterization, dialogue, description, conflict, and all that other stuff.)
Here's some partially completed challenges, where I wrote down a Utopia and a Dystopia (according to the moral sensibilities I started with before I did this exercise), but inventing a (better) Weirdtopia is left to the reader.
Economic...
Sexual...
Governmental...
Technological...
Cognitive...