Sometimes I would downvote a comment that is "average" in my opinion, just because it's on the top and comments that are better but on a lower position would br

Sometimes I would downvote a comment that is "average" in my opinion, just because it's on the top and comments that are better but on a lower position would bring a better discussion. If that comment was not the top one, I wouldn't downvote it though. However, I'd never do that to bring my personal comments higher.