Great info, very interesting.
After reading all of your excellent feedback, I whipped one of my a peppermint 18mg carts (which I haven't really given much of a chance until reading your replies), and vaped it for the first time on my 5V passthrough, and voila...FINALLY, a TH that sort of mimicked that sensation that analogs give.
I think I have to agree that the higher voltage on the passthrough, with the extra heat made a big difference, as well as the "heat" of the menthol. Even though it seems that based on the responses, there seems to be some controversy about what causes the TH, I'm going to have to try out some of the spicy, menthol types of juices to see where the best TH lies, stick with the passthrough as much as poss. for the heat, and stick with at least 12mg nic, b/c the 0 and 4 don't seem to do much.
BTW, luckily, I haven't been tempted to go back to stinkies at all, I'm getting plenty of nic to stave off the cravings...it's just that I haven't been getting the satisfaction of the TH I was looking for -so I will keep searching and trying your suggestions until I find the right juice.
nuvemexo and womanofheart, i am gearing up to DIY cart filling for sure. It seems like that is the best way to go based on the info here. I'll check out the youtube vids mentioned to get a good idea on how to do it.
renro, sorry if this is a silly question, but can u give me the website where u buy your carts (ST?)...still not up on all the abbreviations, but I'll get there eventually.
dormouse...by the way, here's the list of the flavors I received, and tried, watermelon, blueberry cobbler, peach cobbler, peach, sour green apple, banana, bananas foster, vanilla, french vanilla ice cream, strawberry, and rasberry. All are either 4mg or 0 nic. While some taste very nice and do give a nice amount of vapor, absolutely NONE give TH, not even a bit, which makes sense reading what you said about those sorts of flavors.
Thanks again to everyone...I'll let you know when I find the magic potion that gives the ideal TH as soon as I find it. HOpe you all have a great night!