I'm pretty much entrenched with carto tanks now. Use an assortment of types from standard polycarbonate to polypropylene (I only vape menthol), side fill with gaskets, standard Smoktechs and Boge F16 with metal caps, Smok locking tanks...whatever. Luckily I don't have to be fussy about my tanks much. The cartomizer is the thing. I like Boge and Ikenvape best. Use 2ohm for my mechanicals and 2.5 or 3ohm for my VV.
Edit to note: Just now ordered a AGR tank...dang, I must have been asleep on that one! Didn't even know about it until now! lol! Looks to me like the best of ALL worlds in the carto tank world!!! Woot!