edit: I read your question too fast and answered to a different question... since I can't actually delete my post... I'm keeping my original text (instead of emptying the entire answer...), although "slightly" out of context... but that might also be of interest...
"I think this could actually be an option for Style (I mean, the text orientation plane or Normal, but also size vs distance from viewpoint, in non parallel projections), so that we could also easily override it on plot ticks an alike (text styled as embedded object or "overlaid"; with fixed normal, or Automatic orientation; well, something like that...)"
