I believe it would be cool to improve Steam's recommendations by using AI. As it is now Steam recommends games based on the tags of games we play and a lot of the times I see games that are nothing like what I actually play. Sometimes Steam doesn't know if a game suits your style with the question " Is this game relevant to you? ", even if you play games with the exact same tags with the " non-relevant " game. I know that tags are user generated, so here is the idea.

The AI would not just use store tags but different kinds of information such as :

- Screenshots and the description of a game's store page ( not to confuse with community hub screenshots ). This option could also be tweaked based on your own screenshots and videos, I think it would help the AI to understand what kind of games you play.

- Reviews you have written for similar games, in other words the AI will recommend or not recommend a game to you based on reviews you have written for similar games. The way this would work is that the AI would learn from the things you have written in a review and then decide whether it is a game you would likely enjoy ( or dislike, if you gave thumbs down ).

edit : I forgot to mention that you could turn this off if you don't want it. I already said " Optional " in the title, but just saying again to clarify.