I prefer bash, for a few reasons.
- it is often the default shell on many linux distributions.
- it is common. It is available on most versions of linux, bsd, and unix flavours as well, including solaris (the default shell, finally, in solaris 11), AIX, and HP-UX.
- My only other real shell interactions have been bourne shell, and korn on AIX and HP-UX, which I didn't like too much