You're never too old for LEGO. Fortunately, my wife agrees, so there's plenty of LEGO at our house. Sometimes we even let our daughter play with "our" sets. My favorite theme is Technic (aka Expert Builder). As for favorite set, its a two way tie between #8480 and #8880. My latest interests are in LEGO robotics, which accounts for much of the material on this site.
May 29, 2002 - Added some new information on Robolab and RIS 2.0 to Mac and Mindstorms
January 26, 2002 - Updated and reorganized the Mac and Mindstorms section