This kind of personality analysis based on class choices is generally rubbish, but it would at least not be totally meaningless if people only got to pick one class. As it stands, there is no such thing as a "Titan player" except the rare few who made all three of their character Titans. You might get a more interesting results looking at the kind of people who make one character of each class versus those who make three of the same, or two of one and one of another.