Shells

What shell does /prog/ use?
I've only used bash, but I want to explore my options. So, which shell do you use, and, if you feel so inclined, why?

>>120
There is. It was such shit that not even the guy who programmed it wanted it and even wikipedia wants it dead.

http://en.wikipedia.org/wiki/Pysh
Pysh is a Python shell no longer maintained by the owner, who also does not recommend it. Specifically, it is a user shell inspired by Unix Shells such as Bash.

It is proposed that this article be deleted because of the following concern:
Unremarkable software, WP:NSOFTWARE