On the list of important things, the first is definitely important but the other factors, while factors, don't deserve to be mentioned on the same list. For simplicity and accuracy
, it's really better to go with the manufacturer's simple descriptions than worry about smaller factors acting like bigger ones.
For instance, if XXX company says that a certain pickup is hot and good for metal, it's usually the major factor instead of fretboard wood, body wood, or if the pickup is mounted on a pickguard or directly to body. It's a whole lot of fun to speculate about all the other, smaller factors, but you will tend to get two types of pickups
, those that are wound in and around the standard vintage specs of a single coil, P90, or humbucker and those that are wound "hotter". Among the hotter ones, then it becomes how hot you want it?
Don't confuse the main issue of pickup replacement with the small stuff! The small stuff can be issues in fine tuning your sound but get the basic pickup first and chances are you will be very happy. I want a vintage PAF in the neck of my main guitar but it won't make the huge world of difference if I get a Gibson Classic '57, Duncan '59, or DiMarzio 36th. I should be able to dial in a sound and work with guitar, fingers, and amp and get a nice vintage humbucking neck tone. If I can't then there's probably something wrong with me and not my pickup choice.