I wish more would do so, but I can't force them, only encourage them with a vote.
Weirdly enough my paint by numbers posts were getting more comments than my let's plays or basketball posts. Perhaps my regular visitors are taking time away from Hive to celebrate holidays. Or perhaps some of them are not showing up due to lower prices...either way last few days I was getting less comments.
Holiday times are generally quieter, as people travel and are with family. When it comes to engagement, I think that watching people play something is boring :)