I understand jets don't "hold off" but "fly on", hence the possible confusion (everyone of course flares).
... I can "feel" that I should be close, but I never really can tell EXACTLY how high I am
I think that's very much the point. It becomes an instinct from practice rather than a precise judgement. And sometimes your instinct is deceived by your visual cues (especially at night), hold off too high and thunk it down harder than you would like.
(Expect this thread moved to Private Flying sometime very soon)