I'm at a place (finally) where I have found the RTA's that suit my style of vaping perfectly, and have enough spares of each, except for the Fev's (I need a few more).
The only RTA I regret getting is that Damn "Merlin", It seeps badly, can't stand that (and I was even sent a replacement base, but that also seeped).
I don't need to change weather patterns, so my Lemo's (V1's) suit me to the "T" wide open for DL vaping (it's on my G2 right now

), and my others are tight MTL type RTA's.
That's what's so great about this, is that there is a tank style for just about everyone's vaping needs or wants being sold today. More selection = more chance of quitting tobacco.
Giving away some extra tanks is what I do with my Son-in-Law to help him get off of "Chew", which is hard for him, being as he is in the Army and deployed overseas and in the field, but we're trying our best, about half way there.