for me, the most important thing in a story is readability. i don't think i can enjoy a story when it's hard or impossible to understand what the author's trying to convey.
even if they had unique ideas, if it's a headache to read, i won't bother with the rest.
the next thing is their title, synposis and cover.
i prefer those with short, to the point synopsis to get me general idea what the story i won't bother if reading the synopsis bored me to death. for the title, i love those that also gives me a good idea, or something interesting and stand out from the rest. i'm also into anime girl covers, especially if they had girls love tag and NO bisexual protagonist tag in it.
for the uniqueness, they don't have to do something new. cliche tropes doesn't mean it's bad. but when they repeat the bad cliches just because it's popular, without thinking about why it's good or bad, it's probably a drop for me. a good example is the abusive female lead trope.
unique premises are welcome, but it's not necessary. i prefer those who can utilize the cliches accordingly that makes their story work. they don't need to be comedic. if people forced comedy, it just ruins the story for me.
the rest is the execution. i will follow it as long it doesn't cross my bottom line, and cater to what i need.
for example: a story about a lesbian futanari succubus. i will drop it, the moment the main character went for some guy. the same thing when the main character let people walk over them, and they let a villain go, just to bite them in the ass later. i also don't like tragic stories, and thus excluded the tragedy tag.
whether it's a junk-food type, or a deep read, i'm open to things that interest me.
though i'm really picky with my bottom line, that's why i don't stick to a lot of stories. but if there's something that fits it to the end, and it's updated regularly, i will probably stick there and comment often.