KSH is simply the de-facto UNIX shell that has been around forever. It supports every feature of the bourne shell, has taken all the good bits from the C shell, A lot of new Linux users tend to use the bash shell.
It's really what you are comfortable with I guess.

KSH is my favourite and I use this flavour for all my needs

Regards,
Siva Pitchai

I use ksh for everthing

Shoot, there's other shells than bash?

ksh ksh ksh
well i believe the vi commandline feature is not just for ksh
you can have it for bash(or probably other shells too) by using command 'set -o vi'
offcourse thats not "my" reason for preferring ksh. Have been using it long and am more comfortable with it than other shells.

I use csh as my daily job's shell, while ksh is used in my shell script because it compatible with sh and has array feature.

Been using bash and ksh, well since I started mucking about with Linux/Unix. When scripting, I call /bin/ksh which works on all of the Unix environments I work in (AIX, Solaris, Linux).

Carl