I do most work via CLI

Simply put, two heads are better than one. This question is based on user preference and the purposes of the server.

In my opinion, I want to both.

GUI, because I am a newbie and it is much easier for me

Once you learn what to do you will be frustrated by guis that only let you do what they want you to do. Unix is just so rich in command line options the couldn't all fit on a gui.

For most things I prefer a GUI, but for others I very much prefer the command line.
For certain things, it is almost random which I use.
In case of problems, the command line gives much more useful info.

if friendly prefer GUI
if not CLI

CLI can be a lot quicker and easier to do repetitive stuff, like resetting passwords, setting up new users via a template and changing some configurations. GUI is useful when you want to think about things, like when troubleshooting. Sometimes when i'm trying to figure out a problem, just the time it takes to click around in the GUI can help me think about what I need to do. When I know what needs to be done, the CLI is a lot quicker to use. Of course, after 25+ years in computer service, I very rarely find myself having to think too deeply about what to do. I live for those moments!!!

Definitely CLI because it gets the job done with minimum amount of fuss. I think it is faster also.

CLI is better for initial startup configuration for server whereas GUI can be useful for Desktops and subsequent configs for server

CLI over SSH for all boxes except for my desktop, I do not need SSH for it.

CLI for upgrades and system info, GUI for multiple installs. System Manjaro.

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I'd like as much as possible to be available through a GUI. Everything to be available through command line.

I like doing some things in GUI (e.g setting up displays/screens for X, time & date and timezone). Whilst others in command line (like conky setup, package management). And sometimes it just depends on my mood.

In general, it depends on which is faster and easier. And that may down to the task at hand, the GUI design, or what I used to doing (muscle memory).

"No Preference".

For updates, I use the CLI as, for me, it feels somewhat "less inhibited". I can't really explain it, maybe it's a perception. Whatever the case, there's my 2c worth.

For installing new programs, CLI (Synaptic).

For everything else, I guess it depends on the requirements and what works best.

When you want to go from one city to another city or when you go from your home to your office or vice versa, which one you will choose, walking (Command Line) or transporter (Graphical Interface) ???

In a bright sun shine day which room you will choose to stay in, a room with all windows are open and just having a fan (Command Line) or a air cooled room with all windows closed (Graphical Interface) ???

With Command Line you have to remember and have to write lots of commands.

With Graphical Interface you may find some errors, so developers have to DEVELOP MORE !!!