Small batteries are a nuisance, requiring frequent recharging. I'd recommend the Tornado / eGo / Riva models. Cheap, long-lasting and several hours between charges for a fairly heavy vaper. They also open up a wide selection of atomizers and cartomizers for the user.
I typically use 18 and 24mg and have also experimented with zero nicotine e-liquid, designed to give one a throat hit just like it.
I joined the following website a few months back. A helpful community:
They want to bring electronic cigarettes under tobacco regulation, even though they contain no tobacco.
This will mean sky high taxation and possibly a ban on use in public places, advertising, Internet sales and importations. They just can't leave us alone until they wipe out the industry and give the government, Big Tobacco and Big Pharma what they want.