Why black should want to rush to play dragons beats me. The dragon is a pussy.
And the hyper IS unsound.
I play the Dragon for variety; various 2...e6 Sicilians are my alternative to meeting 1.e4. I like the Dragon because its very demanding and taxes your skills at both attack and defence (and typically in the same game). I like that its double edged and can be decided by a single tempo. I don't think its that theoretical when you're playing at the U2000 level either.
That there is a lot of theory in an opening doesn't mean white is going to know it. I doubt class level players know very much the Yugoslav Attack, beyond the main ideas, simply because there's no reason to study it in preference to any other reply from black, unless they play it. Its hardly a fashionable opening anymore.
The Accelerated Dragon is a whole other animal entirely: quieter games where white isn't able to stir much up against black (but neither is black often able to put any real pressure on white's king) and not that much opening theory. A good enough choice for a positional player who wants a solid defence to 1.e4 and doesn't want to deal with much theory.
Why black should want to rush to play dragons beats me. The dragon is a pussy.
And the hyper IS unsound.