I loved (and learned) WriteNow a lot in the 1980s and I was upset when I was instructed to use Word 3.x and 4.x. Word interfered too much with my writing so you can imagine how much more frustrated I feel about more recent versions.

I'll vote for WriteNow, with a nod to Word 5.0 or 5.1 (powerful, fast enough on a 68000, less-intrusive).