Right now? Serendipity and Blackberry Lemonade (I ask them to add some Pomegranate to BL, it's sooooo good!) from iVape. They are both fruit flavors, to me Serendipity is like a watermelon jolly rancher, the BL is just darn nice. They're local to me so I can go smell and sample the juice.
I have sampled other juices from other vendors but nothing floats my boat yet and some of them pretty much sank my boat. I have more on the never-ever-in-a-million-years-buy-this-again list. But I'm not saying what juice or where from. They're... steeping.