One of the things which I missed upon shifting from Ubuntu to Mac was my custom Cowsay on shell load. So I set about getting the same here.
Fortune gives you random quotes each time.
brew install fortune
Cowsay gives you random animal saying things you pipe to it each time.
sudo gem install cowsay
Getting it all together
If you are using zsh, then insert the following in your .zlogin located at the home folder
fortune | cowsay
If you are using bash, put the same in the .bashrc
Then reload your shell. Voila, now each time you load the shell you will get animals saying random quotes