For me, an ADV is exactly what it stands for: "All Day Vape". I've been making my own DIY liquid for a couple of months now, and I've hit upon some flavors and mixes that I'd be happy with vaping all day long - I call these as my "Three Star" mixes.
Other flavors I like, and may even sometimes crave, but I'd probably be sick of them if I had to vape them all day long without changing - I call these my "Two Star" mixes.
"One Star" - Vapable, but I don't ever crave it.
"Zero Star" - Unvapable, also known as "disgusting".
"Four Star" - This is a mythological creature that I haven't met yet, and I'll probably never meet, because I don't think it exists for me. It's a flavor that I'd be happy with vaping all day, every day, for the rest of my life. I've read first-hand accounts of other people's experience with Four Star e-liquids, and I don't doubt them. But this is a highly personal reality here.
Here are some examples. These are mine and mine alone, and subject to change without notice:
Three Stars
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Torrone (Flavor Art)
Chocolate Malt (FE Chocolate + Signature Malted Milk)
Wild Berry Panna Cotta (LA Blueberry, FE blackberry, LA Raspberry, and LA Bavarian Cream)
Tiramisu (FE Tiramisu, FA Espresso, LA Bavarian Cream)
Two Stars
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Blueberry Waffle (Belgian waffle, Blueberry, Maple)
Banana Bread (Banana, Pecan, Caramel)
Key Lime
Blackberry Lemonade
One Star
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All of my tobacco flavors
Zero Stars
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My first few DIY mixes, poured down the drain long ago.