It really depends.
I was never a big tobacco smoker, if you catch my drift.
My eGo and VTR were great for replacing my rolled smokables, allowing those slow, easy draws with a nice French inhale, but I was primarily a water pipe toker, and have spent the majority of my smoking career with deep lung inhales for satisfaction. I was lacking that with my regulated devices.
I've since found solace with my K101 mech and RDAs, allowing me to emulate those deep, rich lung inhales I've always known using my Sky pipes with 1/2" air intakes. Set up right, the flavor, vapor, and TH are pretty intense, and I haven't craved a smoke in a looooong time. I find my sweet-spot is ~50 watts.