I neither downvoted your question nor close voted it, so perhaps you don't want to hear from me. But I almost did both. So maybe that counts.
I've found some of your questions quite interesting. I thought your lie in question was fine, and I voted to reopen it, so I hope you'll accept my word that I'm not prejudiced against you.
I thought about closevoting (and often closevoters also downvote) because I honestly had a hard time knowing what you were asking (unclear what you're asking is a reason to close.) I didn't know if you were asking for a different onomatopoetic word, or if you were kidding with this question:
Can anyone describe what a sucking sound is and how it is made?
Only after some comments were posted did I understand that you were (perhaps?) wondering how slurp is interpreted as a sucking sound. Even then, it's borderline at best, because it's a matter of opinion.
Are you implying that because a number of your questions have been well received that all of them should be, or that all down/close votes that are rapidly acquired are uncalled for? If you are, that can't be a serious question. On this site, the interesting that counts (vote-wise) is in the eyes of the beholders. Even diamonds don't sparkle 24 hours a day.
Is it possible that there are users who vote down or close my question basing their behaviour only on prejudices?
Certainly it is. It's not fun, and it's not optimal, but asking that will do less to change it than making sure your questions don't fall into the categories for close voting.