Does quality matter? I guess most people would immediately answer "yes", but thinking a bit about my own voting habits, I think there's more than just quality. I have limited time that I'm willing to spend on Steem so there's a good chance that I will "miss" quality posts. I have a couple of people on auto-vote of which I believe they produce consistent quality content or groups/communities that I want to support. These votes typically go out before I have read their posts. You mention curation profits - Curation for profit is a hard business and better left to bots, it takes a lot of effort to get good returns with manual curation. But for the authors in my auto-voter list, I try to set the voting time in a way that I have at least a chance for some curation rewards. Finding quality content sometimes isn't easy because there is just too much content on the chain. I found that going through the feeds of other people can sometime help a lot to find good content, esp. if they share similar interests.