I upvote submissions I think are good in the hope that they get more readers and and increased number interesting comments. I upvote comments that I think are

I upvote submissions I think are good in the hope that they get more readers and and increased number interesting comments. I upvote comments that I think are particularly interesting and downvote comments I think aren't worth reading (criteria: factual errors or inflammatory language/positions, like blatant racism). Comments I disagree with (e.g. somebody claiming distributed blockchains or crypto currency have some sort of value) I just ignore (I have never seen such comments combined with racism, so wouldn't downvote).