Your questions are really hard to answer as we all have different preferences of taste. I'd recommend getting the 10mL bottles to start with and see what recipes you can find and create that floats your boat.
My staples are (as of now):
Vanilla custard (CAP/TFA)
Sweet Strawberry (CAP)
Cheesecake of some kind
Sweet Cream
Vienna Cream (FA)
Ethyl Maltol (cotton candy) for sweetness
Blueberry (FW)
Bavarian Cream
Vanilla Swirl
I have about 50 or so 10mL flavors that I experiment with.
Its a hobby and takes a little while to see what you are in to. Good thing is that the smaller flavors are relatively inexpensive. Still much cheaper than smoking!
This place is my go to for looking for something new. Aside from ecf. "
e-liquid-recipes dot com"