Other Monks have already stated numerous positive aspects of Perl, but what I didn't see (hopefully I didn't overlook it!) I'd say that Perl is imho by far the easiest and best language to Unit Test your applications and libraries. Hands down, out of the half-dozen languages I frequently write in (including Python at $work), there's no comparison there. Considering I do Test Driven Development, that's a key aspect of a language for me.

What's hot on CPAN? Raspberry Pi! ;)