I use Smalltalk. It's what OO languages should be, and what keeps me using it is that the language is the library and I can extend it any way I wish to suite w

I use Smalltalk. It's what OO languages should be, and what keeps me using it is that the language is the library and I can extend it any way I wish to suite whatever problem I need to solve and I can do it live, tinkering, in a live environment.