These are additive flavorings that are often used to mix with other flavors. I tested them at approximately 20% in pure PG on my tongue:
TFA Caramel Cappuccino - very strong, burnt coffee note, bitter, fake tasting, requires <1%
NF Kona Cream - pretty decent authentic, medium kona taste with mild fake creamy finish
FA Coffee Espresso - same creamy texture as NF Kona Cream, medium coffee note, coffee mouthfeel
TFA Mocha - mild mocha, authentic
TFA Double Chocolate (Clear) - milky dark chocolate with a sharp semi-sweet bite
TFA Milk Chocolate - mild milk chocolate, not very creamy, a sharp chocolate note to it
HS Chocolate Caramel - both the caramel and the chocolate taste fake and do not meld well together :-(
TFA Tiramisu - authentic, strong
FA Vanilla Classic - fake-ish vanilla, but not too bad, mild
TFA Cinnamon - very strong, cinnamon oil tasting, strong aroma
TFA Raisin - I'm not sure I'm tasting this right, it has an almost licorice taste to it, would add a nice dark note to tobaccos
TFA Brown Sugar Extra - authentic, strong, perfect
TFA Cheesecake (Graham Cracker) - rich, semi-authentic, graham cracker note
Graham Cracker (Clear) - nutty note, semi-authentic, mouthfeel, cheesecake with graham cracker has a more authentic graham cracker note to it
FA Oakwood - great flavor that would compliment tobaccos, dark fruits, and alcoholic beverage type vapes