Programming languages that don't suck

Lisp, Scheme and Haskell are the obvious ones. JavaScript is a nice language. C always has its place. C# might be the jewel of enterprise.

What else is there that /prog/ recommends? I've heard good things about ML. A language that seems interesting from its Wikipedia page is Self, but I'm not too sure about it.

So far:

Lisp
Scheme
Haskell
JavaScript
C
C#
Python
Ruby
Prolog
Assembly
Lua