I was perverted by AutoLISP and CADForth in the very early 90's. By 1995 I was in college and researching on my own, found Self and Squeak and made a rather stupid but fun little lisp that ran on DOS4GW and built a Motif-style Morphic-like UI out of it.

And then I threw it away as a learning exercise. It was a few years of skills building before I really tried to make a language project. Slate had a few incarnations which were quite different from what it currently presents as.