That's like asking everyone "what's your favorite brand of cigs"
It's very personal, all subjective, and one of the main factors of your success at vaping.
My advice? - just keep trying samples, buy some small lots from the classys, trade with your friends, and remember that your taste buds may change.
It took me about six months to find mine, but it was key to me giving up the last few cigs and it's stayed the same ever since.
I you'd like to try some samples, just PM me.
Best of luck!
Sent from my pod