Your e liquid depends on your own personal likes and dislikes - in all honesty. What others like doesn't really matter in this.
My husband can't stand fruity flavors or sweets, he wants a base tobacco flavor and found joy in a butter rum tobacco.
For my personal tastes I like desserts and pastry flavors.. nothing like an Apple pie flavor or a cinnamon roll or cheesecake to me..
Some people love the fruits, others the candy flavors..
So for you, it's a matter of where your personal preferences lie, because it's what will get YOU off the smokes. Once you know what flavors you might enjoy best, then we can help you with some choices of vendor - who makes the best highest quality of your particular flavors.
Then, you will have to play some with what pg and vg ratio works best both for you, and in your device. Many start with a 70vg/30pg ratio and adjust from there if it needs some adjusting.
Here are two vendors I like:
Heather’s Heavenly Vapes, Top Quality Custom E-Liquids
ECBlend Flavors | E-Liquid | Vape & E-Cigarettes