Store sound v/s Home sound

I have purchased a number of speakers over the years. One of the constant problems is when the speaker were brought home they didn't sound the same.  I know stores usually have some type of acoustic work done in their demonstration rooms.  I have purchased speakers  from stores with acoustic work and without.  The one difference in all cases, my ceiling is 8 feet high, their ceilings are 9 ft. or more. Does or should this hight make that much difference.  Most of the speakers purchased sound good once home, but never as good as at the store.  I made a purchase with the amplifier, processor and speakers demonstrated together, once home the system didn't sound the same.  The store was always better.