On Bukkit Dev there is no option to like/dislike a project there is only subscriptions and a download counter. I think it would be great if Curse/Bukkit would add the ability to like or dislike projects. Just because a project has many downloads does not essentially mean every single person likes the plugin/project. And it would be interesting to see download count versus likes. It could also give server owners an idea on what plugins people like more if there are multiple plugins out there that do the same thing.