Video games are the first form of art that lets the audience express itself — other forms of art are about the artist expressing herself. This is what makes games unique and so I strongly believe more efforts should be put into giving players ways to influence the games they play. Ideally, each player’s experience should be unique to that player.
Some people say that for games to be art, the creators must express themselves through their game. Some people claim that we must create games like movies, defining the experience precisely for the audience. I dislike those approaches because they deny the very thing that makes video games unique.