SINs (WIP)
Gibson headstocks
plastics
pearloid
solid colour instruments
Fret buzz
Perfect instruments
Zero frets
Neck heels
pickup selectors
Poly necks
when you buy a guitar you are paying for 2 things, you are paying for the spec list, and then something that cannot be measured on paper, which is the build quality, the exucution, the overall fit and finish and the craftmanship.
guitars building is a subtractive process. every element you add reduces the quality, regardless of its perfection. so basically it all comes down to material quality, craftmanship and care.