I read this 7 months ago when I was getting ready to start. Because of the info on how PG and VG metabolize, I decided that, as a diabetic, PG would be best for me. I've since tested my blood sugar after liquids that are all PG, all VG or a combination. None of them have any impact. So vape what you like best.
In the manual vs automatic discussion I don't think I saw anything about how the manual batt is sealed (better for dripping and for people like me who have a tendency to flood things.)
Cartomizers are becoming very prevalent. They're not just for KR808s any longer. If OP doesn't want to recommend them to newbies, at the very least their existence should be acknowledged and that, as people get experienced with keeping atomizers wet but get tired of constant refills, many turn to cartomizers. (More disposable, less expensive, hold more liquid, more likely to be killed by vaping while it is too dry...)
This thread has undoubtedly saved many a newbie from headaches and over-spending.