I vape a lot of fruity vapes, but most of them aren't what I would consider to be all day vapes for me. I love so many of them though, so i switch around quite a bit. Flavors that are too rich or too sweet typically aren't good ADVs for me either. My main all day vapes have been:
Serenity from Rawr - its a very natural raspberry flavor blended with coconut creme. Its not too sweet, and the creamy coconut part of it makes it smooth enough to be extremely enjoyable all day. Its been an ADV for me for the past few months now, and still not sick of it.
Tea vapes - i have a few, but I have found these to be great all day vapes. Green Peach Tea specifically from Rawr is at the top of my list. It tastes EXACTLY like real green peach tea, and is very pleasent vape. Its another easy all day vape because it doesn't have a really overpowering sweetness, or super strong flavor behind it. I find a lot of the tea vapes to be like that. They sent me a sample in my last order of Green Pear Tea with menthol it in...surprisingly refreshing vape! I wouldn't have thought to add menthol to the tea flavors, but it really worked with that one. The pear gives it a very crisp flavor, which is complimented nicely by the coolness of the menthol.
A new one I have tried, also from Rawr is Fiery Nuts. Its a natural cinnamon (not the red hot candy type) with a smooth nutty undertone. Its another very smooth vape and awesome flavor, I've been vaping that one non stop since it arrived last week, and have a big bottle on the way.