I tried zsh when it came out, but gave up (too rough then). Recently, I made the move and I am quite happy. This workshop will hopefully help me get deeper into it. (I used the oh-my-zsh linked above).

I love how you can type "vim " and press up-arrow, to get previous commands with vim. In bash, after typing "vim " i would have to erase the line, do "C-r" and then type vim again.