Vanilla Bean Ice Cream is a great flavor to use any time you need a rich vanilla flavor it adds body and sweetness to anything you throw at it.
lower end 1% to 3% just helps to combine lighter flavoring .
middle 3% to 5% heavy body vanilla after a steep great with most fruits no off tastes 
high/solo 5% to 8% very heavy body and vanilla almost tastes spicy but not in a bad way works well with cheese cakes and cookie flavors
an all around vanilla flavor I highly recommend if your looking to start mixing your own ejuice