Giles, as he is affectionately called, ran the school library until a certain incident where a giant snake like demon destroyed it as a conclusion to season three. After that he bought the local Magic Shop. The reasons he gave for buying it were that due to the local mortality rate, the rent was kept down and his profit margins would be high. He does have a life outside of watching though, he likes to sing at a local bar. His favourite drink is Tea as you would expect from an American English stereotype. He has since left the show for London and rumour has it he may get his own spin off series. Giles the tea-drinking watcher sounds like a catchy title!