I always write in Scrivener's full screen mode too, for the obvious reason- no distractions. When I read your suggestion regarding fonts and spacing, adjusting them so the formatting essentially becomes invisible, I thought "Nice idea", then realised I do just that instinctively. Font and size, anyway; I'll now experiment with spacing. Yes, I know, I should be writing.

Full screen mode also had an unexpected benefit recently; I was trying to include some BBC BASIC ('80s computer language) and set Scrivener up to recreate the look of the BBC Micro display. It worked beautifully! http://readgetwellsoon.com/post/215475015/ive-been-writing-in-mid-80s-bbc-basic-this