Types most capable of chameleoning are ESTP, ENTP, ESFJ, and ENFJ.
Social chameleoning rests on the Se-Fe or Ne-Fe axis or any combination of extroverted perception and Fe. Why would you all ignore the one function that basically creates/standardizes socialization? I'd say generally TPs and FJs are more socially adaptable, because as socially retarded as ITPs may be (which isn't usually the case in my experience) they're way better at it than ITJs. The most adaptable FPs and TJs are ESFPs and ESTJs.
Also, I'd like to add the mere fact that most people voted intuitives as being the most socially adaptable is crazy. SJs and SPs represent the largest chunk of the population and yet they're not the most adaptable group?
Which type do you think blends into it's environment best? ENFJ for blending, ESFJ for creating the environment in which to blend.
Which type is best at acting like other types? ESTP
Which type is the most adaptable/changeable? ENTP or ENFJ