Nawazuddin Siddiqui has undoubtedly established his proficiency as an actor. In fact, his skills are unmatched and his range of emotions could give even our "stars" a run for their money.
It's almost impossible to imagine someone else playing the IB officer Khan in Kahaani or Faizal Khan in the much loved Gangs of Wasseypur. If he's such an asset to Bollywood, why has it then taken him over a decade to reach where he is today? Is there a bigger question to be asked?