The world moved from CLIs to GUIs. Guis have not only persisted, they've improved. If someone insists on using a CLI and nothing else, after all these years of the world having moved to GUIs, I wonder what prejudice is behind it. How, reasonably, can all these tools beat a thing like Visual Studio? Must limit job opportinities too...?
Some tasks are better suited to the command line. Others are better in the terminal. Package installation lies right in the middle for me. If I know exactly what I want sudo apt-get install is the quickest and easiest. If I am not sure exactly what I want its easier to browse around using synaptic. I can do more complex greps on the command line than most GUI tools will allow me to use.
If I'm actually wanting to install a game of some type, but don't know what I want to try out, then I'll load up synaptic.