I have eGo style 1100 mAH bats and prefer dripping on a 510 LR atty... for driving I do use/have both carto's and a couple type A tanks.
For the cartos I usually keep the condom cap on, fill them from the top and let them soak for about an hour. Then I top them off again so it pools a bit on the top, then I condom cap the top again and let it sit over night. On a carto, I find a slower draw helps... the more snap crackle popping that goes on the better vapor I get.
For the tank, when the tank works -- it works beautiful. Else, its a bloody mess. I find the two most important factors for a tank are making sure the wick inside the pin that leads to the atomizer is flush and when filling the liquid in the cart, I leave an air bubble (almost like the bubble on a level) as I find this helps the flow. I also use a paperclip and remove the top piece on the mouth part of the cart, then remove that second inner piece, then put the outer tip back on. I find this eases the draw and seems to provide more vapor. Before each inhale, I take a quick lil puff on the cart (this usually follows up with seeing a bubble or two rise up in the liquid res. of the cart) to prime the atty.