I have also commented on this here:
NodeBB/nodebb-theme-lavender#31psychobunny created this issue in NodeBB/nodebb-theme-lavender closed Category view improvements #31
Instead of the current Upvote - Downvote mechanic, I suggest having multiple "reactions" to a topic, for example:
All Users: Like, Dislike, Genius, Funny, Off-Topic, ...
Moderators/Admin: Promote/Stamp of Approval
The third feature actually already exists as a plugin haha http://community.nodebb.org/topic/744/nodebb-plugin-dwnvtr-downvoter-plugin
The reactions feature I've seen before, would be nice as a plugin
Post reactions would be a nice plugin