Alot of people have claimed this but I swear vaping is hitting better than cigs or else I would be craving for a cig instead of using my PV. Kinda NIC junkie here. when I do it right could feel the rush pretty much faster than I can exhale. Tingling sensation in the brain and what not....I never got that from smoking.
It's all about amount of NIC, method of puffing, wicking, and a fresh coil.
How much liquid do you go through a day?
1 Pack of Camel Filter or Marlboro Red = 26mg. Assuming you're getting the exact same amount of nicotine from both then 1ml of 26mg liquid = 1 pack.
I'll bet you're going through a LOT more than 1ml per day, aren't you?
The reason your vaping satisfies you is because you do it more frequently than cigarettes.
An analogy I frequently use is waves on the ocean. The level of nicotine your body is satisfied with is Sea Level.
With cigarettes you get a huge dose of nicotine all at once. This is like a big wave on the ocean. Then, you typically wait an hour or two before you have your next one. This is where a trough develops between the cigarette waves and you start to have cravings.
With an ecig you get ripples instead of waves. You don't take in as much nicotine at once so the wave is just a little ripple, but you vape more frequently which reduces the depth of the trough. So instead of big waves you get little ripples, and more of them.
Sounds to me like you're taking lung hits and experiencing head rushes from oxygen depravation rather than a nicotine rush. Nicotine is a toxin, large doses would make you quite ill. A really large dose, say 50mg all at once, would almost certainly kill you.