This really depends on what you want from your new camera strap. A shorter camera strap is great for those long adventures because it gives the camera less freedom. This means if you need to run, or climb something it won’t swing and bounce off other objects.
A longer camera strap on the other hand, is fantastic for slow walking days, or when you want to sling it over your side. There are a variety of camera straps that are adjustable which are probably the better choice if you can’t make your mind up!