it's not that simple ...I'm the same , I need big or at least decent TH and I've been looking for it for months
these are my finding :
* level of nic has nothing to do with TH - I have 24mg and 36mg juices with lower TH than 8mg juices
* Cinnamon based liquids will give you a TH but I can't use cinnamon day and night, it's too much ...
* drink flavors like brandy,tequila and so on have some kind of TH
* I have tryed more than 150 flavors from more than 15 suppliers - till now the only ejuice that gives me a satisfying TH is RY4 in 16mg from VaporNine which I believe it's a Degank juice
* If you use cartomizers, the Turbo or Mega models help improve the TH
* very important is the device you use - anything under 3.7V like eGo or janty stick or 510 gives me zero TH on any liquid , only KR808D is good as is a true 3.7V
* if you are confident, you can use mods and go up in voltage - using 6V or 7.2V will give you TH on almost any juice !!
* another way is to get the concentrate flavor Diablo from Tottaly Wicked -just 1 drop in a 30ml bottle of juice gives such a big TH you can't actually use it
hope it helps