I've done a lot of posts on reasons queries didn't get to yes.
Here's the flip side: queries that led to requested fulls.
1. I'd read an earlier version of the manuscript, liked it, but not enough. The author revised, and requeried. I generally take a look at these, particularly as in this case, I remembered the book without having to consult my files.
2. Voice. Everything from the rhythm of the query to the characters names just charmed me. There's plot on the page. A writer I know and like suggested the writer query me. Category is way outside what I normally read, but I still requested it. Bottom line: good writing always gets my attention.
3. Revised submission. I'd requested the ms on the first query, but it didn't get far. This is a revision. I'm usually willing to give writers another chance, but twice is the limit.
4. Interesting setting, good writing. Category is not one of my usual, but I like to see good writing no matter what.
5. Non-fiction. Came with a glowing recommendation from one of my clients who read the book. I read the pages with the query and agreed.
6. Non-fiction. Utterly compelling story.
Notice how no one is blacklisted if their manuscript got a pass?
Notice how good writing will get a look, even if not in my category?