Fish has one of the best auto completion out of the box, I love all you get for free with zero configuration. I used zsh before, which is great, but require so much configuration.
Fish autocomplete when navigating directory trees is a life changing thing.
this is so interesting. i kid you not, as soon as fish starts doing its thing my brain shuts down. i cannot use it not even for a minute. i've tried. i had to try because the assholes where i work forced it on me. so i threatened to quit. it worked ;) ... back to good ole bash.
there are zsh distros that come with good defaults such as oh-my-zsh.