Well I started with whatever they sold me! I bought my ego kit at Awesome Vapor in Atlanta.  With that I bought several flavors that were brewed in house.  My favorite was double butterscotch.  
Then I read a bit more and found out about the popcorn lung thing from butter flavorings and got freaked out..cause Awesome Vapor uses that ingredient....grr.
Then I broke a couple ego batteries and a ton of tips...so I went back to the drawing board.
Bought a Provari, a dbox clearomizer, and a protank.  
Then I found NiteLiteVapor for 
juice.  Bounty hunter and Fruit3 juice.  Very, very good stuff.
I've wanted to try and buy the Ahlusion stuff, but after a week of going to the site every single fricking day and it being closed to new orders i gave up.  So for me NLV.  Easy to order, comes quick, is pre steeped, and ready to go.