If a gallbladder is removed,what kind of dietary changes would a person need to make? Why?

it's been just over 6 months since I had my gallbladder removed. Before the surgery I Googled " Post Gallbladder Removal Diet" and did a bit of research. One guy boasted in a blog that he got out of hospital and went straight to MacDonald's and had a Big Mac and large fries with no ill effects. On the other hand I read other blogs written by people who claimed they couldn't have any food that's even remotely fatty without getting awful cramps and spending the rest of the day rushing to the bathroom. For most people, including me it has been trial and error. I have found that as long as I'm not stupid I can eat pretty much anything I want except deep fried foods and really rich , fatty foods. Despite what the doctors tell you there is a good chance that some things may be off the menu permanently. The best advice I can give you is to take it slowly at first. I lived on clear soups , steamed veggies, grilled chicken and fish and rice for about a week after I got out of hospital but 3 weeks later I had a couple of slices of pizza without any problems.