Hei, I've been through the whole process and got a no after the second interview with partner, in which i definitely did not show my best... :(You can find a lot about cases on different consulting companies' pages - loads of examples. I actually got a few brain teasers (sort of in in the middle of a case - talking about agriculture had to calculate how many cows there are in the country)... Otherwise - try to be very structured under case solution. do not just give your ideas as in the brainstorm, but try to give a structure to it. In addition, try to look for unusual, not clearly obvious solutions... On the personality part - just be a nice person, but be able to show that you can be both - tough and humble :) Good luck :O)