Developers often take a religious fervor when it comes to defending their favourite language, or poking a rant on another. Some people have singlehandedly been able to draw considerable attention within their communities. Joe Armstrong with erlang, Paul Praham with Lisp/Arc or Douglas Crockford with javascript are other candidates who are almost synonymous with the language itself. Documentation and the developer community behind the mailing lists, or irc channels are another indication. Performance , dealing with legacy and platform issues, adaptability to learn , the IDE and tools associated , the list could go on...
What language do you program in predominantly, and are there interesting stories or reasons behind what made you do so ?