There are many ways to play bass guitar, as there are many styles and genres of music and each has its merits in a given situation. One that seems to be good for all is strap position. 1/A strap should be wide to spread the load. 2/ A strap should be away from the neck and towards the outer shoulder. 3/ The outer shoulder is hard bone, not like the soft tissues near the neck. The outer shoulder supports better without compression of this soft tissue. 4/ It will be part of the design of the guitar that will help in this. As a rule long top horns on a bass will help the strap stay away from the neck area. 5/ The height of a bass can in some case be a factor. It is amazing the difference an inch or so can make either way. 6/ The ability to move the bass from the front to a side on postion, to an up-right, to a flat position make access for the fingers easier in some situations. Because the bass hangs on us we cannot vary how we get to certain positions. On an up-right, or free standing bass, bending the knees, dropping the shoulder, bending over it a bit more will give us access. But because the bass gutar hangs on us, these factors do not affect it, the bass stays at the same height to playing whether you bend the knees or or bend over. Is the strap height fit for purpose? Is it made of the right material? Is it a fashion statement for the genre you play? To high and the plucking hand suffers because it has to make compensations in angle of access with the arm and wrist, but the fretting hand has better access and angles for the wrist. To low and the fretting hand suffers with access and angles while the plucking hand now has better access and angles due to the arm and wrist being straighter. In the neck at location C7, is where the main nerve, artery and vein runs from the torso to the upper limbs and ultimatly the hands. From the spinal column leaves going along the shoulder through the arm and to the hands. C7 has a longer transverse process on its left and right side to allow for the carrying and protecting of the nerve, vein and artery to pass safely to the upper limbs and then on to the hands. Any problems here with pinching or compression will be felt in the finger tips as that is where the nerve ending are at their most concentrated. Think of it as like a garden hose when the water stops coming out the end, it is usually a problem somewhere else in the line. What you see is the result of the problem in the water stopping, not the cause. So if you strap or strap positon is wrong, and you inhibite these functions you will suffer as a consiquence in-directly whether you are aware of it or not. As rule wide strap and keep it to the outer shoulder, never near the neck if possible. Also avoid karate chopping spies, ninjas, TV detectives, action heros, or failing that Vulcans that are pissed with you.