We really are all different. I swear to gog I don't care about the nic buzz at all. I knew when i was / am smoking that it wasn't about the nicotione, rather the habbit.
For me it's all in the action and the inhaling and exhaling of something tasty, 11mg juices are way enough for me.
Though with the cigs it is a bit more about the chemicals as I do feel relaxed, but with vaping i just get a stimulant feeling and pounding head, which I really don't care for at all, hence the low nic juices I use.
Just a question of finding that which suits our own idiosychrasies. I'm not there yet with regards to juice and eqpt and it can be costly, but hey ho, it's something to do.
I'm pretty much in the same boat though I am only experiencing an occasional, very minor headache. I'm actually finding I am able to sleep better as I have backed way down from my analog habit over the past few weeks. My biggest concern is a failure to recharge batteries/refill carts in time and being unable to vape when I want to. I'm doing what I can to prevent that from happening.