Choice of roles
Rajnikanth, during his evolutionary stage as an actor-star, has done the mandatory rapes on-screen. He has been the baddie, get whacked by the lead actors, and taken the plunge to death from cliff - in short, the entire works. But that was in the past. Today, Rajnikanth tailors his films to the last word, every syllable measured and weighed for its connotations and interpretative possibilities. His 'Robo' did some wicked things, but he knew that the audience would understand. But as Rajnikanth, the star on-screen, he is the ultimate Robin Hood. He does bad things for the public good; and he doesn't push the boundary. He is cocooned in his image trap, and he is happy to be there.
Amitabh Bachchan seldom did the villain trip in his initial days (brilliant exceptions being 'Parwana' and 'Reshma Aur Shera'). He was the angry young man, out to right the wrong. He was the lone crusader. He was the man above men. He was Big B. In his second coming, Amitabh has defied all his star trappings. He dares to take on roles that he would not have touched with a pole longer than home in his heydays. Think 'Nishabd'. That definitely is not a movie Rajnikanth would have done. In breaking free, Bachchan has also proved that his versatility is still yet untapped.