There was a great article on this board when I first joined, something like, "When you've blown enough bubbles". The point of the article was that, if your diving is always the same, you may eventually lose some enthusiasm for it.
Wow, someone read my article, The Borg Princess. I'm now afraid to dive the Mexican Cenotes (caves) for all the scary things in there.
Looking back over the last 38 years of diving, there are very few of my friends that still dive, Some diving friends have been diving longer than that. . . but there is a comon thread among long time divers. Enjoy doing what others won't do. I started spearfishing, spent a lot of time teaching, moved to underwater photography, fixing up a few marinas, finding lost things in the water, teaching a few new generations of divers. I've never been preassured to earn a living underwater, very hard to do. Always found good people who wanted to learn new skills, taught a couple of Underwater Explorer Scouts, who went on to the Navy Seals. Helped lots of divers get their first fish for dinner. And have remained a free source of information about our freshwater lakes.
This past year had fewer dives, Two hurricanes, downgraded to tropical storms, dumped heavy rains, with mud into our lake. Next year I'll be diving more, if the lakes are OK. I lost a speargun two years ago, when my partner had problems. I didn't dive there this year because of conditions. . . I'm sure I'll find it next year. . . I know the area, and few people still diving even dive within miles of a really great diving place. . . How did I find a special, but difficult dive spot? I've been to almost every spot on the lake I dive, I share the common areas and keep secret only a couple of spots.
Will I loose interest in future dives? Only if no more new divers will ask for help, or more experienced divers no longer want a fish fry, to drink beer with friends, and tell stories.