Hi there, fellow consumer of Japanese media. I sometimes watch anime and read manga and novels, and I'm assuming you do as well. If you want to know about my likes and dislikes, here is an all-out essay. (Don't worry; it is only a bit too long.)
1) I am not trying to conform to any particular high-brow standard here. I don't believe in any "objective" or "universal" critical standards. There are quite a few works that are critically acclaimed in some way or form but I still didn't find particularly interesting. Maybe they are too episodic. Maybe the pacing is absurdly slow. Maybe the dialogue is stale. Maybe the story is extremely black-and-white. Maybe they rely too much on visuals and forgot to add the actual substance. It happens.
Generally speaking, don't be boring, please. That is the #1 rule. It is also very broad and non-informative. It's a good thing I wrote an oversized essay, right?
2) We have all seen the classic match-up: the goody-two-shoes square off against the embodiments of evil. Morally black-and-white to the extreme. You have probably seen it quite a few times, actually. I sure have. Doesn't it get boring after a while? How about something else, such as questioning beliefs that people take for granted? Show some nuance, ideological match-ups that are actually interesting. Everyone knows that the obviously evil supervillain is in fact... well, evil, but where's the fun in that?
3) Plot. It is the part of the narrative that involves things actually happening, and I do not mean action scenes. I mean actually substantial changes in the current status of the story, characters, and so on. That sounds good, right? Well, some authors have said, "Who cares?" Minute after minute, page after page, nothing really changes in any significant way, and you start wondering why you are watching or reading it in the first place. Speaking of which, please don't stack it full of filler episodes between the plot-relevant ones. There is nothing like pausing everything in favor of random events that won't end up making a difference.
It is also a problem if there is no conflict to speak of. If you are presenting a work that is so low-key that people do not even disagree on any issues, how am I supposed to maintain interest? Then there is no point, really. Keeping that in mind, I am again not only talking about action scenes. Conflict doesn't necessarily require action scenes. I actually tend to prefer scheming, mind games and argumentation to outright physical action scenes.
The tactics should also make at least minimal sense. Otherwise, the characters are arbitrarily winning with plot power. If you portray a character as a genius and try to demonstrate it by having them make nigh-impossible predictions and rely on extreme coincidences and deus ex machinas, the character is not actually a genius at all. But even flawed tactics tend to be more enjoyable than no tactics at all. You don't get points for not even trying.
...That said, tactics are still secondary to other points such as the main substance, interesting motives for the characters, morally nuanced match-ups, etc.
4) You may have seen anime adaptations that seem suspiciously rushed. That is because they often are. Especially when the source material is a novel, it is easy to see how much of the contents is lost. With so little runtime available, chances are that they will cram in whatever they can (sometimes the wrong parts) and barely get anything done. Time to knock off a few points. That said, the amazing part is that some adaptations still manage to be too slow-paced, but that is a separate issue.
5) Witty dialogue would be nice. It is very important, actually; right up there with the plot. Try to make it so that the actual lines are not boring. Comedy is a great idea, but please avoid copy-pasting the most overused anime jokes because they get old eventually. You know, like the most generic of slapstick and fanservice jokes.
6) World-building is good to have, but lately I have felt that massive infodumps aren't really necessary either. Flooding a story with a long list of characters, locations, and technical info does not help by itself. You need to make sure that they are actually relevant and interesting. There are many benefits to building social and political relationships that go beyond the few core cast members, but narrower world-building is fine if you can still run a solid plot and great dialogue with it.
7) By the way, even if I rate something low, it doesn't mean that it is necessarily unwatchable or unreadable. Some of the really bad ones are bad in particularly funny ways, so they are great material for watching or reading ironically. I will drop the really boring ones though. Incidentally, in some reviews there is the odd case in which the enjoyment score is higher than the overall score, and as you might guess it was about watching ironically. It is related to the "so bad it's good" trope.
8) About rating methodology: I set the 10/10 point a bit lower than the absolute maximum because otherwise the ratings would be devastated by even lower scores. It would be scorched earth, and nobody wants to see that. So everything above a particular threshold will generously get a 10/10. No need to be one of the greatest masterpieces of all time. There was no other way to make it work reasonably. In practice, there still don't seem to be that many 10s though.
Vote for this guy. What could possibly go wrong?
By the way, I will accept most friend requests. And if you want to have conversations on Discord, that is an option. You can PM me for it if you like.