I've just started learning Lisp and I find Arc fun. Hence, the suggestion. There are some nice people like coconutrandom, CatDancer, palsecam, zck and conanite who are active and helpful on the forum e.g. http://arclanguage.org/item?id=10554. The unofficial code repository Anarki is pretty good too.

People are doing some cool stuff - http://arcfn.com/labels/arduino.html

What's not to like?