My first computer [1] didn't have Microsoft Word on it, but it had WordPerfect installed with the OEM Windows. I've always had really horrid handwriting so I preferred to type out all my homework since I was twelve or so, so I had to use whatever I could to do so, and WordPerfect was there.
I grew to actually really like it, and I used it for about two years until my hard drive crashed, I had to reinstall Windows, and then I installed StarOffice (which Google was giving away for free from Google Pack or something like that).
Still, I liked WordPerfect, and looking at the history it seems like it was actually quite significant; a part of me feels like it should have been the de facto word processor instead of Word.
[1] Not counting the hand me down Commodore 64 I got as a pretty young kid.