I think it would be a good idea if, in AG3, there was a feature underneath the game that says "People who favored/gave this game a higher rating also favored/gave a higher rating to..." thus leading you to new games that are not on the home page, but are still fun to play.
I don't know if this has been announced or thought of yet, I don't really look at this stuff too much. But, I still think it's a good idea.
I don't know how the part about showing what other people fave'd/rated highly would work. I think that it should only recommend similar games to the current game you are playing, or something like that.
On AG3 there's already recommendations under the game you're playing.