My best reason for logging dives other than to show your experience is that there will be something you'll want to remember that eventually you'll forget. You'll forget where you've been, you'll forget what you saw, you'll forget your buddies' names & your instructors' names.
And I admire people that were diligent in their logging. One instructor I know has 120,000 logged dives after 40 years. That's super cool.
And I admire people that were diligent in their logging. One instructor I know has 120,000 logged dives after 40 years. That's super cool.