Interesting. Intuitively, INTJ on left. INTJs have an intense/piercing/serious look. The other person has his eyes glazed over like George Bush, I doubt he's the INTJ. Moreover, of the INTJs who like pets, many tend to be fond of cats but that is usually to provide them with compansionship that others ostensibly cannot. Yet this person has both the cat and his arm around the other, which lends itself to 'openness' and extraversion. Additionally, the person on the left has his hand to his chin, which suggests he's thinking about something other than what is going on in the picture which lends itself to intraversion.