Nicotine River, Bull City, and Ecigexpress are my go to for all my supplies. Amazon for my bottles. I did the Pharmacy VG and Tractor Supply PG when I first started, but fund that I got better flavor when buying them from a supplier for DIY Ejuices. I buy my PG &VG from Bull City now with great results. Also Liquid Barns VG & PG is very good. I get mine from BC because I live 45 minuets away and shipping is fast. I get my nicotine from Carolina Xtract. I have never had any issues with it being harsh and it is always clean. Some have mentioned that they have gotten some harshness from it, but I love it. I have no experience on Nic Salts, but from what I have seen from people online it is very smooth.
VG Nicotine is harder to work with IMO because it is very thick. You will have to shake it a lot more before using it. PG carries the flavor and VG makes the the vape cloud. I started with 50/50, when I knew nothing, and it tortured my throat. I went 80/20 and now settle at 70/30. Also the higher the VG the slower it will wick. There will be a transition period from smoking and some find it difficult and go back to smoking. I had a bit of a rough time. Sore throat a few times and dehydration. You must drink more water as the PG will pull moisture away from your mouth. After a few weeks I had no issues and don’t even think about cigarettes anymore.
In my experience with Vape Wizard and Smooth they really don’t cut the throat harshness. They cut more of the harsh flavor and will take away the flavor levels and mix them together. I very rarely use them.
Changing VG PG Ratios will effect the flavor some, but not as much for all recipes. You will usually get more flavor from a higher PG, but it will make it a dryer vape as the PG will dry your mouth out more. You will find your sweet spot.
There are many options for PG sensitive people, but I am no expert on that. I know their are some all VG flavors.
As far as chocolate the front runners talked about in the vaping community from what I have read are Molinberry Glamour Chocolate, Jungle Flavors Milk Chocolate, Flavorah Milk Chocolate, and Hangsen Australian Chocolate. I have HS and FLV and they are ok IMO but not really good to me so far. I have JF and MB on the way from Black Friday sales now. Also LB White Chocolate Peppermint that lots are raving about. I am still very new working with chocolates so I am no expert by any means. Plus flavor is so subjective. As for Mint I use Flavor Art Arctic Winter at around 1%. Straight smooth mint flavor. I recently purchased WS-23 30% from Ecigexpress and absolutely love it. It gives you a super cold vape on your throat without the mint flavor. It is stronger than Koolada and doesn’t effect your flavor like Koolada does. I mix it at 0.25% with FA Arctic Winter at 1% for a cold minted flavor in some of my fruit mixes.
I have no experience with Pina Colada recipes but some coconut flavors can be very candy tasting. I like Purilum’s Coconut for a more authentic one. Ecigexpress has a Pina Colada one shot created by a mixer named ID10T http://www.ecigexpress.com/shop/diy-e-liquid/one-shot-concentrates/diy-mixer-s-showcase/if-you-like-pina-coladas-by-1d10t.html . I have not tried it but has some good reviews.
And you thought you were long winded. Lol I have been mixing now for around 10 months and this is some of the stuff I have learned so far. There are many here that are far more experienced than I am and have a lot more advice. Everyone I have met here has always pointed me in the right direction and we’re more than willing to help. Mixing does have a learning curve, but with one shots becoming more popular DIYing your own is easier. Recipe development is a whole other ballgame.
Welcome to the world of vaping, and stay at it. It will get you away from the cigs. I am living proof of someone who smoked for 27 years and have been completely off the cigs for just under a year.