I'm a developer, and an ex-sysadmin. Using the CLI makes my life much simpler. I greatly prefer being able to write scripts, and use things like PDSH to run commands across many boxes. For example, go through every web server, search their logs for occurrences of IP X and then count the number the number of requests per second. Is this something I do every day, nope, but the basics of doing it are the same as the basics of so many other things that I do that there is no issue memorizing the commands.

Using guis and managing a server without a CLI is a very annoying situation.

There are other things where using a GUI is way nicer, like complicated partial git commits.

Also thanks for informing me that I have aspergers, guess I'll have to go have a doctor check that out ;)