alchemist, I smoked about 25 cigs a day (for about 35 years) and I found at the beginning I was happy with 18 mg juice. These days I'm mostly at 6 mg and headed lower soon I think. Started with an eGo-C and still use that gear, though I've found better juice delivery in other hardware. Twist batteries are very nice to have. Waiting for my first Vivi Nove, which I have read a lot of great reviews on lately.
As to your question about how accurate juices really taste, well, it depends. I've found I like coffee, fruit and minty flavors the most with the occasional tobacco craving thrown in. I've found coffee hard to duplicate but absolutely great when it works for me, but then there are a lot of different coffees out there too - depends on the bean, the sweetener and the milk/cream combo, so a lot of room for variation in the flavor. In the fruits I have found mostly they are pretty accurate, just some are sweeter, some are mixed with other flavors like Strawberry Daquiri and Cherry Balsom, some are weaker in taste and some stronger. Tobacco probably has the most variation of any flavor I've explored and some of the ones I've tried I found just horrible. Sorry I can't be more definitive here, but taste really is a matter of taste ... All I can suggest is that you try small bottles of various flavors until you have a better idea of what you like. Hope this helps a bit at least