Lambda the Ultimate

Personally I'm very comfortable with using a combination of C++ (with STL, Fusion2, Phoenix2), Python (with PyGTK, SciPy) and SWIG. But then programming is just a single hobby of mine (audio stuff and some quantum mechanics, mainly).

So I'd like to hear some opinions from more experienced or even professional developers out of curiosity. What do you think about the common PLs in use with regard to large scale development? Please don't compare different languages, but instead tell me about a particular PL you have used and why it is suited for a bigger team of programmers or why it is a hindrance.

EDIT: "large scale" = "more than a handful of developers"