Same experience here! It was such a great first intro for me. Learned basic programming concepts but could quickly put together something "real" feeling. It was a nice middle ground. The Pascal aspect was pretty ergonomic for a neophyte, and the GUI design really was unparalleled.

Dabbled in UIs after: GTK, .NET, etc. All disappointing and awkward. Do web dev for internal tooling when I have to, but I don't enjoy it. I do backends but mostly stick to lower-level systems stuff after falling in love with K&R and Unix early in college. Well, and firefighting prod performance problems.