Some personal experience to offer, hope it helps.
18 year smoker, pack a day, analog free for 2 1/2 weeks now.
I've really noticed that when I'm stressed out (happens at work a LOT) I hit the PV a little hard. Initially the TH is OK, but the more I hit it, the less I get out of it. Perhaps the chain-vaping is numbing your throat some. I have noticed that after a while off the vapor, I'll get that TH again.
Like you, I'm still looking for a bit more TH.
I've also noticed that some of the fruitier flavors hit a bit harder for me. I would prefer the coffees and vanillas, but blueberry, pear, strawberry, orange, guava, and a few others I don't remember hit harder and more consistently than what I thought would be my favorites. I've tried all different levels of nicotine and the higher doses (at least for me) did nothing except make me feel like I was overdosing on the nicotine.
I'm working on my 3rd sample pack from bluemistvaping dot com, still looking for the right one.
Hope that helps, good luck.