A couple years later I'd get my hands on a TRS-80 at school. I loved it.
When I went to high school in 1983 we had the Apple IIe in our lab. I spent hours on them doing basic and later Pascal. By then I had a vic-20 at home. I was a part of a nerdy group that hung out in the computer lab any time we could and we had a pretty good relationship with the head of the match department. When they go their first Mac, that was the first time I saw gui in person.
We were given a few minutes to play with it and I really liked it. I don't think it was so shocking though. While the command line was my normal initial interface, I was used to playing games that provided a GUI of their own to interact with the game. The gui on the mac was another program like a game running on top of the OS.
After high school I didn't have a pc of my own for years. When I did get one is was a Packard Bell sx386 running DOS. I had that for a decent amount of time before I got my first copy of windows. For me it all just fit together and I would say to this day I think of a computer and it's operating system as the CLI it provides. The GUI is an abstraction that runs on top. I like a nice desktop ( KDE is my favorite ) but I get very frustrated any time I can't get underneath it and do what I want. My first instinct any time I hit a problem that feels difficult, is to drop to the shell.