There is this pattern where a Logia user can become the element and dodge whatever is trying to hit him. So, why didn't Enel change to lightening to dogde Luffy's attacks? Even though Enel is not protected against rubber, he could just make himself intangible to anything solid.
Notice that this is not a weakiness like Crocodile had, because this one would just miss his powers when hit by water. So there is no excuse for Luffy to hit Enel. My point is, Enel was a paramecia user.
Enel didn't control the electricity around him, but the one the capacitance INSIDE him. He was just a natural capacitor, storing/discharging electricity on his will, out of nothing, pretty much like Luffy is a natural rubber and can release a huge potential energy from his rubber muscles out of nowhere.
I have some other thoughts on this matter, but I'd like you to discuss.