Hello Adam, I like you was a very heavy smoker for 45 years. I decided to give ecigs a go basically health/money. I started on ecigs 3 years ago with a basic elite look alike and then progressed onto a Riva/Ego510 with CE04 CLEARO. I still use them. I find they do exactly what I want them to do so why would I change what is suiting me. You might find the PG is not suiting you, some people can't get on with it. Try a VG based liquid and a lower nicotine content of say 24mg. I like tobacco flavours. After all, you are trying to substitute the 'real fag' so go for the taste as though you had a real fag. Works for me. Fruit flavours do nothing for me, I don't get it at all! And also, after smoking all those years, don't forget, you have a load of crap on your lungs that needs to come up as any ex smoker will tell you, persevere my friend, you will be glad you did in the long run! I know I was! The 510's will give enough kick to make you give up the fags. Go for a 24mg nicotine liquid, tobacco flavoured, and say 60 VG 40PG and see how you get on, but go gently, I get my liquid from bestcigliquid.co.uk They are brilliant at getting you what you need. Good luck, and don't give up! xx