Likely only a half a billion different kinds of
juice out there, and there's someone that loves each,
and someone that hates that same flavor.
Then consider that as your tastes change, your likes and dislikes will change.
Confusing to say the least...

..
I like vanilla also myself, but have yet to find a juice that delivers, even if I DIY my own. It's a nice flavor to mix with other flavors, just not by itself.
I would hesitate to recommend any particular juice as your taste may be very different that yours, and it would be a disappointment for you.
Best path you can follow is trying
small samples of what sounds interesting from a variety of vendors, see what you like, not what someone else likes..

Try simple single flavors, vanilla, licorice, maple, lemon, etc....see how they taste to you.
It's easy to mix a couple (small quantities) to expand the variety. Trying to add a flavor to Double Chocolate Cherry Kona Coffee Tobacco Latte to adjust it to your taste is a losing proposition. (very small samples work well for those flavors

)
My personal favorite flavors are Menthol (no tobacco / mint), Absinthe, and Lemon...
YMMV
And I have a couple dozen other small bottles of other flavors when I feel like a change of pace.