As a linux user who has had Ubuntu on his home machine since 7.04 Hardy Heron, I know my way around the terminal window and I prefer it to a gui for most tasks.
The terminal window is much faster for most tasks as you are using the keyboard instead of the mouse.
There are tasks however, that I do prefer using a gui, and searching for files is one of those things. Also, I am not as fast on the n900 as I am with my regular keyboard.