For me, the reason I prefer mechanical + Kick is size. A Kicked P+ is smaller and thinner than a ProVari, and is dramatically smaller than the Z-max / VAMO / eVic / etc. There's so much wasted space in most electronic mods. I don't like vaping on a Mag Lite. The more discreet size of mechanical mods such as the P+ indicates refinement, and smaller mechanical mods are friendlier to my grip.
On the other hand, the eGo Twist, Vision Spinner, Kgo VV, etc. are too small, too insubstantial, too fragile feeling. They put the center of gravity up at my Penelope and the whole PV feels unbalanced and unfriendly, like it wants to flip out of my hand at the earliest opportunity. They're perfectly lovely as something disposable and expendable when I'm out on the lake or mowing the lawn, just as hotel soaps and shampoos are worthwhile while traveling.