Note, that if you are buying for two any 510 threaded device will allow you both to use the same stuff. The Ego,Kgo whatever entry models are a great way to get started and to figure out what you like before plungiing into the mod world. My wife started on a 510 as she did not like the size of the Ego, I started on an ego. Both can use the same 510 threaded cartomizers. After you experiment a little you will have a better idea of what you like and dont like, ie more heat, better throat hit, longer battery life, ect. So starting with a basic ego kits for both(or any competitive brand listed here) is a great first step. Also, down the road it provides a great secondary or back up device.
Regarding
juice, this is a very fun aspect of
vaping, as there is so much to try. I often order from no less than 5 vendors at any given time. My flavors are never the same either. I have found a vendor or two that are my go to vendors, but there are so many different flavors to try out there, don't limit yourself just because you dont think you will like something.
vaping flavors is very different than you think.