The vast majority of vapors who DIY do not add a specific mix to increase "throat hit" , if you want throat hit it's best to opt for e juices with a 50/50 PG/VG ratio or even 70/30 PG/VG .
You may hear that all VG mixes are the way to go and thats hogwash "unless" you have a sensitivity to PG or our strictly a "cloud" worshiper , ( many people are cloud worshipers these days) mind boggling i know but people are into all types of weird stuff .
How else would you explain stuff like "Chia Pets" ( a clay pot that grows weeds ) so you can pretend it's hair or a Mr. Potato head for instance , (an Idaho potato that you pin plastic ears, nose and lips on) , it's just mind boggling to me.
I won't even get into the awesomeness of what people refer to as a "pet rock " (it's a stone for Gods sake people) , you can find one in your yard if you look hard enough , no need to blow $$ on one.