Talking about uniqueness falls short on which type of uniqueness a person has. Uniqueness could be either an advantage or usefulness or it could be just plain abnormal which makes one standout among the rest of the crowd. With the vast examples that could be possibly used, let's take for instance knowledge or intellect. You may have encountered people who seem to know everything regardless whatever topic there is or could just be plainly repeating what other people just said like a parrot or a recording machine on auto playback. Looks smart eh? Nah, there's a word that fits such people.
