It's strange but after Python I don't feel like I need/want to learn sth new.
This is based on my own personal experience, that of Python Ireland members and from things I've read or seen (here on HN and elsewhere).
I once read a quote that when you're using itertools frequently enough in your Python code you're one step away from jumping to a language like Haskell.
My progression went similarly - I started using map, reduce, filter and list comprehension a lot, then moved on to itertools and functools and then decided what I really wanted was a functional by default language. That, the great concurrency support and the desire to learn a lisp-based language properly[1] made me choose Clojure.
It seems that this progression is actually fairly common. I still use Python for quick'n'dirty scripts (especially as a shell scripting alternative) and for web development (for other people; I use Clojure for my own code).
[1] I already knew some Scheme, but never used it for any real projects.
However, I am forcing myself to learn Clojure. There must be other maxima in this space.