Shell preference?

I'm trying to replace the default shell, when searching I find that most web sites lack either full details about the shell, screen shots, features of the shells, links to the authors site, ect.

So, I'll turn to the boards. What is your personal shell preference?

Name:
Description:
What can it do:
Why *YOU* like it:
Ease of use:
URL:

Thank you in advanced for your comments and opinions.