csh/tcsh
I also used to use csh and tcsh a lot on proprietary unices and Linux, but eventually switched to Bash, because (A) almost all scripts one encounters use sh-style syntax, so better get familiar with it, and (C) Bash is the default what you get in Linux installations.
But in some ways the csh-style syntax is more user-friendly. Initially the rules where sh (or bash or ksh) expects a newline or semicolon in control structures were clear as mud to me. Csh is more like a normal programming language.