A "Like" button for comments
I'm thinking primarily in forum comments, but on other areas as well, such as blog posts or kit/asset descriptions. Similar to FB or Pinterest, just a little way to acknowledge that you saw and enjoyed something on PS.
Adding the LOVE button from gallery pages to forum posts could accomplish the same thing.
Laura Wellinghoff commented
I would like to see the ability to like or thumbs up under a COMMENT in a thread.