All I have in my bashrc are aliases and PS1. The PS1 changes if I'm root, but I don't know if that would be useful for a default. I also don't know for sure if this still needed for my setup =o)
I'd done it originally because I couldn't see any difference between regular and root terms, but it may have changed since busybox was updated.
A couple of my aliases might be useful for the general public, but I wouldn't say they're worth adding as defaults.
alias :q='clear; exit' # because I keep thinking I'm in Vim =o)
alias path='echo -e ${PATH//:/\\n}' # displays directories in $PATH on separate lines
alias ping='ping -c 4' # keeps you from needing to manually stop it
I haven't used ping in TC, so that might not work...might need a "sudo"