I really like less rock AND less coral. That way the few colonies that a person picks can actually grow large and look more 'natural'... I've seen pictures on this forum of more specimens in a 20gal than what I have in a 120gal. This may or may not be a minimalistic aquascape, at this point I think its too grown-in to tell. But it is my favorite all time tank. 273gal with about 30 colonies.
http://reefkeeping.com/issues/2006-10/totm/index.php