I'm actually impressed that Blu is working for you. I was a pack a day smoker until recently. Alot of my friends are into vaping pretty heavily, and they have recently gotten me hooked. I first started off with Blu, and I could never get rid of that stomachy, "I need a cig" feeling. I recently bought an Itaste vv, with a T3S Tank. I did alot of research before my friends even chimed in and threw in their 2cents about it all. I learned about coils, and to make sure I got a unit which I could adjust the watts / voltage on. I refreshed myself up on ohms law just for that fact. My friend took me to a local shop, and the owner was a real gem. She showed me all the different models, let me try out a bunch of things, canisters, mods, flavors etc etc. (Sorry if my lingo isnt up the snuff im still a newbie myself). She was rather impressed with what I knew though. I did spend alot of time researching this. So I went into it, knowing what the strength of coils would do, and how to fill a tank, and what tanks were better, and what mods were good for what thing. There is literally an unlimited amout of knowledge to learn about vaping, but it really all comes down to preference. I work in an EMS field, so I wanted something I could conceal if need be. Something which also didnt weight 10lbs, and didnt bust a lung out when trying to vape on it.
Sorry for the rant here, I guess all n all, my advice, as I was a fellow Blu e-cig smoker, is to get rid of that ecig as I have and never look back. For me to get 2 canisters, 3 e-liquid 15ml bottles, several replacement coils, and the mod, it costed me around 80$. And I will be set on everything for probably 2 months give or take. Then all i need to do is buy liquid, and coils (you can dry burn and clean them out yourself to make them last alot longer, but its alot of work "for me at least" and not easy for everyone to do, especially just starting out).
My advice, if you have a local vape shop, go in and talk to the vapers in there. Because not only do they carry a wealth of knowledge, but the things they will have you vape on taste a WHOLE lot better (then Blu), but it will actually if you want it to, get you to quit the nicotine all together. I started off with 18mg, and im down to 6mg, as I enjoy vaping all day.
Again, sorry for the long post, and rant I guess, but just offering up some advice from one newbie to another.