Gary Gygax answered fan questions in a thread (actually several threads) on ENWorld for ages. Paul from the Blog of Holding blog has compiled all of the questions and answers into one large web page. (Gary made this easier by quoting the questions in his reply.) Reading Paul's compilation version is much easier than wading through all the posts in the ENWorld "Ask Gary" threads, at least if all you are looking for is Gary's answers to questions. See Paul's post on this and then read all the questions and answers.