I won't be much help because I bought enough to last was is left of my lifetime worth of concentrates years ago and many of them might be/or probably are discontinued. IMO you have to do your own homework, learn each flavor stand alone before complex recipes. So your keeping it simple will make success faster and far more attainable for you. The only way to find the right percentage for your own personal tastes in the gear you will run it in is to find it yourself. With a single flavor to your taste success will be almost immediate. There are guides online to help that suggest percentage ranges for stand alone and recipe use for most of them where somewhere within those ranges works for most folks. And there are endless threads here on ECF to peruse for just about anything that is known about doing DIY.
My all time favorite Cap was Capella Eggnog (above all other nog's), followed by their Golden Pineapple. I'm pretty sure they stopped offering them years ago though.
TFA is an up the down staircase of flavors that I seldom used alone. If I had to pick ones that I did
vape alone sometimes they would be Absinthe, Almond Amaretto, Jamaican Rum, Kona Coffee and Mexican Coffee.
Most of all have fun with finding the DIY's that you like the best. Good luck.