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?

- OS: Windows 8 ENTERPRISE Edition
- shell: cmd
- programming language: Java, C# and Visual Basic
- text editor: Visual Studio .NET 2012 Business Edition
- version control: TortoiseSVN Premium Pro