Depends on what you plan to do with your diving knowledge and abilities in the future. Professionally, I`d seek on-going training that would apply to my career path. Recreationally, it would depend on the type of diving you want to do or think you might encounter. Deep Diver, yes. Drysuit Diver if you plan on diving cold water. Navigation, always a wise choice for limited viz or disorientation, etc, etc. Look at the benefits of each elective and how it might help your future diving abilities. Good luck and practice, practice, practice.