(This is a semi-serious introduction to the metaethics sequence. You may find it useful, but don't take it too seriously.)
Meditate on this: A wizard has turned you into a whale. Is this awesome?

"Maybe? I guess it would be pretty cool to be a whale for a day. But only if I can turn back, and if I stay human inside and so on. Also, that's not a whale.
"Actually, a whale seems kind of specific, and I'd be suprised if that was the best thing the wizard can do. Can I have something else? Eternal happiness maybe?"
Meditate on this: A wizard has turned you into orgasmium, doomed to spend the rest of eternity experiencing pure happiness. Is this awesome?
...
"Kindof... That's pretty lame actually. On second thought I'd rather be the whale; at least that way I could explore the ocean for a while.
"Let's try again. Wizard: maximize awesomeness."
Meditate on this: A wizard has turned himself into a superintelligent god, and is squeezing as much awesomeness out of the universe as it could possibly support. This may include whales and starships and parties and jupiter brains and friendship, but only if they are awesome enough. Is this awesome?
...
"Well, yes, that is awesome."
What we just did there is called Applied Ethics. Applied ethics is about what is awesome and what is not. Parties with all your friends inside superintelligent starship-whales are awesome. ~666 children dying of hunger every hour is not.
(There is also normative ethics, which is about how to decide if something is awesome, and metaethics, which is about something or other that I can't quite figure out. I'll tell you right now that those terms are not on the exam.)
"Wait a minute!" you cry, "What is this awesomeness stuff? I thought ethics was about what is good and right."
I'm glad you asked. I think "awesomeness" is what we should be talking about when we talk about morality. Why do I think this?
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"Awesome" is not a philosophical landmine. If someone encounters the word "right", all sorts of bad philosophy and connotations send them spinning off into the void. "Awesome", on the other hand, has no philosophical respectability, hence no philosophical baggage.
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"Awesome" is vague enough to capture all your moral intuition by the well-known mechanisms behind fake utility functions, and meaningless enough that this is no problem. If you think "happiness" is the stuff, you might get confused and try to maximize actual happiness. If you think awesomeness is the stuff, it is much harder to screw it up.
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If you do manage to actually implement "awesomeness" as a maximization criteria, the results will be actually good. That is, "awesome" already refers to the same things "good" is supposed to refer to.
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"Awesome" does not refer to anything else. You think you can just redefine words, but you can't, and this causes all sorts of trouble for people who overload "happiness", "utility", etc.
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You already know that you know how to compute "Awesomeness", and it doesn't feel like it has a mysterious essence that you need to study to discover. Instead it brings to mind concrete things like starship-whale math-parties and not-starving children, which is what we want anyways. You are already enabled to take joy in the merely awesome.
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"Awesome" is implicitly consequentialist. "Is this awesome?" engages you to think of the value of a possible world, as opposed to "Is this right?" which engages to to think of virtues and rules. (Those things can be awesome sometimes, though.)
I find that the above is true about me, and is nearly all I need to know about morality. It handily inoculates against the usual confusions, and sets me in the right direction to make my life and the world more awesome. It may work for you too.
I would append the additional facts that if you wrote it out, the dynamic procedure to compute awesomeness would be hellishly complex, and that right now, it is only implicitly encoded in human brains, and no where else. Also, if the great procedure to compute awesomeness is not preserved, the future will not be awesome. Period.
Also, it's important to note that what you think of as awesome can be changed by considering things from different angles and being exposed to different arguments. That is, the procedure to compute awesomeness is dynamic and created already in motion.
If we still insist on being confused, or if we're just curious, or if we need to actually build a wizard to turn the universe into an awesome place (though we can leave that to the experts), then we can see the metaethics sequence for the full argument, details, and finer points. I think the best post (and the one to read if only one) is joy in the merely good.
Because you make few assertions of substance, there is a lot of empty space (where people, depending on their mood, may insert either unrealistically charitable or unrealistically uncharitable reconstructions of reasoning) and not a lot of specific content for anyone to disagree with. In contrast, if I make 10 very concrete and substantive suggestions in a post, and most people like 9 of them but hate the 10th, that could make them very reluctant to upvote the post as a whole, lest their vote be taken as a blanket endorsement for every claim.
Because the post is vague and humorous, people leave it feeling vaguely happy and not in a mood to pick it apart. Expressing this vague happiness as an upvote reifies it and makes it more intense. People like 'liking' things they like.
The post is actually useful, as a way of popularizing some deeper and more substantive meta-ethical and practical points. Some LessWrongers may be tired of endlessly arguing over which theory is most ideal, and instead hunger for better popularizations and summaries of the extant philosophical progress we've already made, so that we can start peddling those views to the masses. They may view your post as an important step in that Voltairean process, even if it doesn't advance the distinct project of constructing the substance-for-future-popularization in the first place.
Meta-ethics is hard. There are very few easy answers, and there's a lot of disagreement. Uncertainty and disagreement, and in general lack of closure, create a lot of unpleasant dissonance. Your article helps us pretend that we can ignore those problems, which alleviates the dissonance and makes us feel better. This would help explain why applause-lighting posts in areas like meta-ethics or the hard problem of consciousness see better results than applause-lighting posts in areas where substantive progress is easier.
The post invites people to oversimplify their utility calculations via the simple dichotomy 'is it awesome, or isn't it?'. Whether or not your post is useful, informative, insightful ,etc., it is quite clearly 'awesome,' as the word is ordinarily used. So your post encourages people to simplify their evaluation procedure in a way that favors the post itself.