My first flavour was a banana bread/chocolate that the nice man at a local B&M gave me when I bought my first vape. I then received a sampler pack from a friend who didn't need it, containing flavours ranging from strawberry/cream to bourbon.
I don't think I've tried any flavours I've disliked yet, although I'm quite tolerant of everything when it comes to taste. However, I generally lean more toward tobacco bases like White Beard Tobacco by Velvet Cloud Vapor which is easily one of my favourites. They claim it's a RY4/Butterscotch/Custard/Tobacco but to me it tastes like a tobacco with grassy notes, and light vanilla/custard (I'm crazy for it so if any of you guys know of a recipe for it, I will love you forever).
Currently I'm alternating between raspberry doughnut/yogurt and a vanilla bourbon/tobacco.
My only advice for finding juices you would enjoy is to find some base(s) that you like (in my case, tobacco is one of them) and working around that