I Robot

Hi. Right now I am reading I Robot by Isaac Asimov. I am on page 91. Not much has happened in the book besides that these scientists are discovering that robots are gaining feelings and are developing wants of their own. I don't know if it is a good book yet since I have read so little of it. I am not sure what the theme is other than robots are starting to break the rules because they are finding loop holds within the three robotics rules. There has not been any character jump out and say I am the best because there hasn't been enough character development in the story. when will the good part of the story start?