If you want something that's fun and easy to use, but don't care about performance, I recommend Python. Python can be made faster when compiled for JVM with Jython, but this only works with Python 2.x.
If you like wordy languages where "everything is an object!", try Java. It sucks for desktop applications, but runs great on Android devices.
If you're feeling adventurous and like headaches, try Haskell. It'll blow your mind, mannn... Functional languages like Haskell are great for building discipline and good coding practices. But if you want something like Haskell that's not as strict, try Clojure. It's a Lisp, so brace yourself for a boat load of parentheses.
My personal favorites are C++, Python, R, and Ada.