[handrous]

The surprisingly-"smart" completions are the only thing I really notice about zsh vs. bash, but AFAIK you can add the same functionality to Bash if you like. Ditto the git-related prompt modifications, like showing the current branch or whether your working dir is dirty, which is kinda nice—you can configure that sort of thing in bash, as well.

You can do all kinds of fancy stuff with zsh (especially via something like oh-my-zsh) but it bloats it and slows it down too much for my liking. Maybe if I were trying to work on a machine with no GUI, I'd go for that sort of thing. As it is, I don't need a battery level graph or load monitor or whatever, always visible in my terminal.

[unanswered]

It's a sad state of affairs that when people think zsh they think "battery status".

The most important thing about zsh you should think of is "no need to quote variable expansion".