Well the more nicotine you have in your juice will add or decrease the TH.
The more PG you have will carry the Flavor along with the Throat hit. VG is just for the Vapor that comes out.
I find that a 5050 VGPG mix for me is a good ratio with 18mg, But thats for me.
What is the PGVG ratio of yours along with the nicotine level?