My first full screen editor was Edgar on IBM's VM/CMS. We later upgraded to XEDIT, which was a great improvement.
The first PC editor I used was the IBM Personal Editor PE(Personal). Later, having really liked XEDIT, I purchased KEDIT for the PC, which was a very good XEDIT clone for the PC's. Other editors I used were the WANG system editor, the see editor that came with Desmet C, and the TurboPascal editor.
In 1984 I started developing QEDIT and founded [SemWare Corporation] in 1985. By then my keystroke habits were a cross between XEDIT/KEDIT and WordStar (although I'd never used WordStar, but I had become very familiar with the keystrokes because of the TurboPascal editor). QEdit was initially developed with Turbo Pascal v2, and the first version was distributed in late November 1985.
In 1988 I said goodbye to Pascal and started converting QEdit to C.
I continue to work on TSE, and have a blast doing it!
Along the way, I have become a collector of editor's. Some of my favorites (besides TSE and the others mentioned) include Brief, Conroy MicroEmacs and those based on Nigle Gilbert's e. And like many, I'm an admirer of EMACS?, VIM and elvis.
Being somewhat of a minimalist in certain areas, I also have a great admiration for TinyEditors. One version of QEdit was only 29k, and the first usable version of TSE (this was the version used to develop the rest of TSE - it included virtual memory, macro language interpreter, multiple files, full block support, etc.) was only 30k. I'm greatly impressed by e-Mtv, Freemacs, Slim, T, Ted, Terse, and ue.