I suggest reading through some of the TFA dedicated thread. As Bill says "99% of TFA flavors are incomplete, almost all them require you to add something to get the flavor you are after." Since you seem to prefer fruity flavors I suggest you pick up a couple more fruits, Strawberry and Raspberry (which added at low percents helps bring out fruit flavors and kill "perfume taste") and then you will want a couple creams and sweeteners, Vanilla Swirl, Sweet Cream, TFA Cotton Candy (sweetener), or Ethyl Maltol. Also with the current blueberry you have, most recipes will call to add some Blueberry(Extra), which helps bring the blueberry taste to the front. If you get those 6 flavors + the two you have, there are about 1000 different recipes you can try on here

Most of your juices will be broken down into 2 categories:
Primaries: Fruit flavors you want to be dominate (10-15% total generally, but each flavor varies)
Secondaries: These are flavors that enchance your primaries, so low amounts of creams, sweeteners, and secondary fruits (5-10% total)
Hope I could be of some help, my first shipment of flavors arrives this week, so up to this point all my knowledge comes from reading through thousands of posts on here.