LikeBetter asks you which photo you like better and then tells you things about yourself. The 'brain' was right when it said I'd prefer to be a pirate over a ninja, but wrong when it said I prefer spicy food over not-spicy food. Either way, picking my favorite photo was fun, even if the conclusions are neither accurate or scientifically inclined.
At first I wondered whether they meant a split second response, or a carefully calculated opinion of the photo. Then I wondered whether they meant if I like the subject matter of one over another, or if I liked the artistic quality of one photograph over another. I quickly realized it didn't matter because this site is not a cognitive science revelation but a rather an easy breezy time-killer.