My go to is a smallish Aegis solo and doggy. If I want obscenely large/long vape, I will go back to my tried and true config of Super T ELA 2 and Erlkönigin. The solo/doggy is more convenient to me for most occasions, mainly work and pocketability.. water, dust, shock resistant. I work in a rough and tumble environment. Size does matter, but depends on how you use it

.. personal preference, what your situation is, et cetera.