I will call him an Artist rather than an actor, His dedication is clearly visible from his speeches and acts.
In an interview when he was asked “how do you feel, being a dancer?” his answer was “I am not a dancer, I am an actor who can dance”.
Ever since release of Kaho Na Pyaar Hai, I started believing that he was a superstar and he proved to be one, The justice which Hrithik could do with duality of roles, I feel only handful of actors could do it in Industry. Hrithik has an ability to do justice with roles which he could do in most of the films (other than movies like “Aap Mujhe Acche Lagne Lage” and Main Prem Ki Diwani Hu types).
The Best ones are for sure, Jodha akbar, Kaho Na Pyaar Hai, koi Mil Gaya and so on. I still remember his act and eyes filled with character in Jodha Akbar which made the movie more watchable and Hrithik, one of best artist in industry.
The way he has worked with his body structure and looks is really commendable and he has really become irresistible. A sure shot choice for like James Bond (There was no reason for not selecting him). His eyes really speak a lot as The Great Gurudatt said once that the acting of a good actor lies in his eyes.
Dancing is for sure his forte and he is one of those who brought this feature back to Indian cinema, the way he danced in Kaho Na Pyaar hai and Dhoom2 is a memorable experience. He is a trendsetter and will remain for a long time and his acting getting better by the time.
Coming on to weak points of him is surely comic acts where he has failed to perform and this is what stops hi in touching the leagues of actors like Kishor Kumar (I really believe his acting has that extent). Would like to see him doing more fabulous acts and with some fantastic creation by this great actor.