Whatever 'perfection' is. Pretty hard to pin down, especially when very few people agree on what constitutes an ideal.
Someone recently posted a guy playing exactly the same piece of music on 7 or 8 different very high end Guitars. The response was interesting. Every single Guitar got chosen as a favourite, save one. That one was the least known maker of the bunch. The rest was split fairly evenly, although I think one was selected above the others by a matter of . . . 2 votes! I think that one was the most expensive. It would have been much more interesting if it was carried out as a double blind test, complete with a few Walmart specials! It's also interesting to note the response when people post pictures of Guitars that have been made by the real high end, well known makers. Everything becomes 'fantastic!', 'incredible workmanship!!', unbelievably beautiful !!! - you get the idea. When a 'no name' is posted the response tends to be very muted and sometimes the no name looks a much better presented Guitar.
Perception. It's one of the golden keys.