1 - Tried a couple convenience store disposables, and that sold me on the concept
2 - invested heavily in Joyetech 510's. Recharging carry-cases, extra-long ones, you name it.
3 - Moved up to some Ego stuff.
4 - Got an Innokin SVD, and moved up to ProTanks!!
5 - Got a Provari (and another, and at some point traded some Joyetechs for a Vamo)
6 - Discovered (and yes, invested heavily in) Cartotanks! Fancy ones!
You want 'em? They're available... (Kir Fanis, VapourArt, ByLeo...)
7 - Got a Reo...and yes - you guessed it - invested heavily in squonkers!