Drywall on wall just over 8ft.
The point in doing the ceiling first (and, of course, leaving the edges unfastened) is to shove the upper wall sheets up tight against the ceiling pieces, thereby helping produce a nice, straight wall-to-ceiling edge all the way. Then you use a toe jack to snug the lower wall sheets up against the upper wall sheets.
The space left at the bottom is no big deal. I usually use a ripped piece of 1/2" plywood down there so I can nail my baseboard anywhere I choose.
"True eloquence consists in saying all that is necessary, and only that which is."
François Duc de La Rochefoucauld