Does a flat ceiling provide the best sound?


I have heard that flat ceilings in homes are superior than a peaked ceiling for acoustics.  Is this because there is less space for sound waves to develop and reflect back down?  I'm thinking of the more shallow peak of a four-season addition that is fairly low and simply follows the roof line, not so much the steeper vaulted ceilings in living room/dining room/kitchen floor plans.  Would some rug hangings or similar help correct this in a shallower peak?  Thanks!  
jafreeman
Great advice--interesting to hear that speakers are designed for ceiling heights of around eight feet--will have to keep that in mind.    
Albert Porters ceiling is not an eight foot flat ceiling. As you look at the speakers the right wall rises up considerably higher than the left
It’s not only the shape of the ceiling and walls but also the color of the ceiling and walls that affects the sound. Whaaaat?! Anyone care to hazard a guess what colors are best for the sound - one color for the ceiling and another color for the walls?

Geoffkait, you made a great point a comfortable pleasing room can set a mood one could only think would positively affect listening.
I wish you would start a topic in that regard.
24X14X8 with acoustic resonators sounds great but the room is 1960 cheap dark fake wood paneling acoustic ceiling panels.