Lisp. For all purposes. It conquered my brain in 1988 and ever since then it's the first thing I turn to whenever it's an option. My favorite Lisp ever was Ralp

Lisp. For all purposes. It conquered my brain in 1988 and ever since then it's the first thing I turn to whenever it's an option. My favorite Lisp ever was Ralph. My favorite nowadays is Common Lisp. Generally speaking, I like any Lisp better than anything else, but I prefer those that preserve the whole interactive programming-as-teaching culture in all its glory. Python for when someone needs me to work on Django, and also for helping my younger daughter learn programming, because it's a pretty accessible place to start. C when I need to be that close to the machine and there's some reason not to use Lisp.