I am making a little portable computer, and would like a text terminal operating system for the raspberry pi, mainly to eliminate the need to bring around a mouse to use it.
Raspbian Lite boots to a command prompt with the option to force login or bypass if you want.
You could actually install the full version of Raspbian and configure the system to boot into command line mode by default via the raspi-config utility.
Then when you have a mouse and space handy you just start the GUI system up with the command
So you get the best of both worlds.
Remember some small wireless keyboards come with a trackpad that emulates a mouse for very little space loss.