Well, you've had a taste of cig-a-likes (10 Motivs) and they are all much of a muchness. That's a polite way of saying crap btw.
Personally, I would get set up on what I would say is a halfway system so you can get a good taste of what vaping is all about without a lot of faffing about as sometimes can happen. Then once you have a stable set up, you can start looking around the 10 sqillion e-liquid vendors here in the Uk to go through as many sample flavours as you can to find a few that you like. Taste is very very subjective and so that side of it is purely down to you.
As a 15 a-dayer, I would suggest you start with flavours that are of an 18mg/24mg strength, which is medium to medium-high. The stronger the flavour, the more bite or throat hit you'll get. You can easily adjust as you go along.
We have a Wiki and a Diki where you can read up on all the vaping terminology and background info to vaping and you'll find it very helpful.
In the meantime if you order this kit
http://www.ukecigstore.com/e-cigarettes/advanced-kits/joyetech-ego-passthrough-kit-upgraded-battery which comes with a sample bottle of juice and order a 5pk of what they call cartomiziers and a few other different bottles of flavour of 18mg strength, you'll be good for a few weeks. This will give you time to bed down into the vaping scene.
Any other questions you will inevitably have, will be answered the good folk of POTV.