I've had 'why do the speakers have to be so big? That's ridiculous'
But she was an attractive young lady so I let it go. Thought it best not to mention that I regretted not getting the next model up that were twice the size.
'You don't need all that stuff just to play a CD' was another classic.
My favourite was a bloke who had a JVC midi system and was highly sceptical that it was possible to improve on it. After a long listen to one of his favourites he reluctantly admitted, 'Yes, it does sound a bit better on yours'.