What type of games you develop on your own?

How can one get into a career in game design? What kind of education, if any, is preferred? Where can we start?

Who does the playtests? How do you make sure that the idea or enviroment doesn't leak to the public, like it did with GTA not long ago?

What are your favourite games? Is there any of them you have worked for?

What was the worst piece of feedback you recieved?