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?

>>78
I'm thinking of a framebuffer-based character console, not an X terminal emulator.
fixed number of columns FTL.  Fuck off, already.  People want flexibility in their displays, and how do you multitask?  Virtual terminals?  screen?  DIAF.