I find anything but plain text irritating when writing (I dislike attempts to merge the creative process of writing with the only peripherally related creative processes of orthography, layout and printing). The WYSIAYG editor "revolution" and the associated explosion of opague untranslatable binary file formats did us all a huge disservice. My students learn fairly quickly that my warning that assignments submitted…
I think you should rethink this a little, constraining or adapting your medium will provide you with different results that can be better or worse, depending on your goal of writing.