The most fun language (having tried lots of them) I put my hands on is Julia, I just love it. You can do so much with such little effort and it can be optimized

The most fun language (having tried lots of them) I put my hands on is Julia, I just love it. You can do so much with such little effort and it can be optimized to almost match the speed of C. The 2 main downsides is the lack of proper interfaces and object.method() notation, which is sometimes more readable.