Here are the TFA fruits I really like. Most of them I like at 12% with 5% EM (I like the sweeter side of things).
Watermelon
Juicy Peach (not the regular peach; this is my new fruit favorite)
Pineapple (very acidic; to prevent coughing I use at 5%); Juicy Peach & Pineapple mixed 50/50 is really good (I use 6% each and add 5% EM)
Pear
Papaya (I like this one, but it's not a favorite)
Cantaloupe (I like it, but others have posted that it tastes weak to them)
Cherry Blossom (has good taste, but to me it does have a perfumey or chemical undertone to it)
Good as standalone flavors:
The apple pie is pretty good as a standalone; I'm vaping it right now. I mixed at 12% + 5% EM. The spices are not overpowering; you can actually taste the apple in it.
The English Toffee is good as a standalone, if you like that flavor. Guess I'm fixated at 12% flavor for TFA.
I like Vanilla Cupcake as a standalone, but I also use it to mix with other flavors.
Simple Mixes:
Buttery Nipple is made with 14% Butterscotch & 7% Irish Cream (I added 5% EM). This recipe came with the ejuicemeup calculator. It's one of my all-time favorites.
Cafe Mocha is my own recipe. If you like really strong coffee with a hint of creaminess, try 5% Coffee, 3% Mocha, 3% Bavarian Cream, & 5% EM (optional for sweetness).
Hope this helps a little. Here's to your success!
Edited to add: I noticed Levitus mentioned the orange cream. I've tried it and yeah, I like that one also as a standalone flavor.