I think the safe answer is that you're just going to have to keep trying until you find what works for you, and it may not wind up being an all-day vape in the end, it may be a rotation of favorites, or you may just keep subbing in new juices into the rotation for a long time to come, no one can tell in this game.
I've had probably half of the recommended juices listed above, I like a lot of them, some of the ones listed I've tried and not liked at all, but I also got tired of most of them after a time, no matter how good they were/are.
Personally, I think they'll all get old sooner or later.
I am starting to consider vaping more along the lines of eating rather than smoking.
You wouldn't eat the exact same food every single day, day after day after day, would you, with all the variety out there in food?
I think people, for obvious reasons, consider vaping much like smoking, but I think really when you scrutinize it it's more along the lines of eating, and when you start looking at it like that, your mind will accept different answers than it once would have, such as you wouldn't want to eat the same thing every day, it's just a behavioral habit left over from smoking that can actually drag you down.
Granted, the habits formed from long-time smoking are VERY strong behavior habits.
But habits, once identified, can then be looked at for what they are, just a habit, that's all.
Personally, I think people who have been vaping quite awhile that still chase the smoking game can become like a rat on a wheel, going round and round and round with a destination that's always just out of reach.
Instead, look at your vaping as an experience with it's OWN habits, all the rules are new and fresh and completely open to your own fresh interpretation.
Not only does it not have to be like it used to be, but for some of us, we may not have a choice in the matter. No matter how hard we try, our vaping, regardless of our wishes, may never be like our smoking was, so better off to get used to the 'new' rules and adapt rather than stay on the wheel, ever thinking you'll reach the promised land one fine day, ...like it used to be when smoking...I think some people may get there, but others never will.