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?

>>54
Wat. No. The only thing more retarded than a pseudograhical program is running a proper CLI inside one. Or even worse, using your graphics display to emulate the look of a terminal in order to get pseudographics to run a CLI in.