The veteran Nepalese actress will be seen next in the Hindi horror film Bhoot Returns.
She told Hindustan Times: "I don't watch too many films. I need to change that about myself, until it is highly recommended. During our days we used to only sing in the gardens or somewhere in Switzerland or Paris or New York
"That was commercial cinema for us. But now the definition has changed. It's more realistic in nature, more believable. Today I also see small budget films accepted due to multiplexes and audience are accepting it too due to western influences.
"There is a scope for Paan Singh Tomar, I AM, Dev D, Gangs Of Wasseypur, Kahaani. In our days such films wouldn't have got a decent release."
Koirala, 42, added that she is open-minded about taking on film roles in the future.
"I consider Ranbir Kapoor the best actor than anybody else. I've seen the range of work that he has done, the comfort zone he brings in. He is so effortless," she added.
"I am a confident actor and I like his confidence too. I would love to work with the younger lot given the right script comes my way."
In February, it was claimed that Kareena Kapoor's latest film Heroine was inspired by Koirala's career.
However, director Madhur Bhandarkar denied that Koirala is the real life model for Kapoor's character.