I am a happiness miser and senior developer.
Professionally, I use C#, but I actually write more code in Python since most of my work lately is prototyping. Much of my work these days involve large-scale storage and image processing systems.
Outside of work, I mainly use Clojure and Python. I am also what most would probably consider expert-level in C++, C, and Java.
As a note: I give terrible programming advice, so I hope you read this before you read my answers!
If you want to follow my weird irreverent sense of humor, you can try to make sense of my twitter stream: @birryree