Oh boy, you're opening the can of worms here greatly, and thus I suggest you PM me
If you want to go into extremes, check out
www.cannabisrehab.org. I can attest that it's not only combusters either, when you vape you are getting a shit tonne of exogenous cannabinoids into your system, and if you do it frequently enough, you will downregulate many processes in the brain/body. Do your own research, this is NOT the best place for it as it's a PRO-weed forum, and many refuse to correlate with any negative health effects. With vaping, and any drug (it IS a drug), the poison is in the dose. If your appetite isn't there unless you are high, you are going down a slippery slope.
I will always have weed/vaping in my life, but after 10 years of doing this, I have suffered dearly, and have had to restructure my life and relationship with the plant. I would love to chat with you in private via PM if you like, and share my experiences. But just note, even though vaping makes me relaxed and horny, I definitely have experienced negative effects in that department. I'm constantly testing/experimenting on myself, and sharing experiences on other forums. Just the fact that you are asking is a really good thing! Welcome to FC my canuck brother!