For me, DIY is the most challenging aspect of vaping. Your not alone. For years I have only managed about 10 recipes that I consistently liked over many hundreds of recipes. My taste is always changing so finding a great recipe is like trying to hit a moving target. I see you like a recipe with RY 4, one of my favorite flavors.
I stick with tobaccos, they are the easiest flavor to work with. Might like to read:
https://www.thevaperstable.com/flavorah-tobaccos-part-1/
Favorite tobacco flavoring discussion - Tobacco flavoring discussion only
Workgroup Tobacco Reviews : CloudCollective
90% of the fruit flavors are not for me, I tend to focus on bakery mixes. It helps to narrow down your vape flavor category and stick to primarily with flavors you think you should enjoy. Here's my list breakdown which may inspire:
Bakery
Butterscotch / Butter Rum/Toffee
Caramel
Chocolate
Cinnamon
Creams/Custards/Vanilla/MM/CC
Nut
Peanut Butter
Tobacco
MISC SINGLES/Fruit etc.