I usually find one juice I really like out of every 10 I try. Actually maybe a bit better odds than that at PureVapes.
What PG/VG are you getting? VG dulls flavor. I use up to 50% VG on an atomizer, 20% or less in cartomizers to keep good airflow and drag. If you are using atomizers, you need to keep them clear. If using cartridges on an atomizer, try restuffing with the blue foam - easier to rinse and pat dry for fresh taste. Cartomizers - try not to singe them (singe adds a bitter taste)
I am not a picky eater but many juices are weak or not very aromatic. BTW remember to smell the vapor. Your tongue can only taste sweet, salty, bitter, sour and umami (MSG). So a cherry juice vapor, for example, should taste an appropriate amount of sweet and sour on your tongue but it won't be cherry unless you smell the vapor.
Some I have liked - Vapor4Life WOWbacco and WOW Vanilla, Velvet Vapors Raspberry Gingerale and Vanilla ALmond Tobacco, FreedomSmokeUSA Pomegranate and oRYental 4 and the nutty pungent Desert Ship tobacco for cartos, and for an atomizer Hopscotch and Voodoo (remember to smell Voodoo - a bit subtle but mesmerizing). Vixen Vapor Peach. Several I tried as samples from PureVapes like Raspberry custard and Mango. Oh and Gourmet Vapor vanillarum (vanilla w/ caramel and rum). And my first all day vape was Backwoods Brew Casablanca (on an atomizer)
Two other honorable mentions but they drop too much sediment for me to use them in cartos - FreedomSMokeUSA Cocoa (strong and almost bitter, can really put muscles into a tobacco), and their Orange Ball (excellent and the sediment isn't too bad and it can add depth and excitement to a blah tobacco), and Juicy Vapor B52 (B52 tobacco - Baileys, Grand marnier, Southern Confort and tobacco flavor)