Designated Hero: Vikram. Subverted in that the movie plays with expectations that the male lead is the main character. The big reveal in the end is that Sona is the author backed role.
Ensemble Dark Horse: Many people really liked Sanjay Kapoor's self-parodying performance.
One-Scene Wonder: Anurag Kashyap (probably playing himself) trying to change the ending of Dil Ki Aag. In a movie full of memorable cameos, his still was one of the fan favorites.