Recently-turned-producer Roman Sen speaks about venturing into Hindi cinema after years of experience in the advertising industry. He talks about the artistes he would like to collaborate with, namely, Amitabh Bachchan, Shah Rukh Khan, Aamir Khan and Salman Khan and the 'Kahaani' director Sujoy Ghosh and 'Vicky Donor' maker Shoojit Sircar.