Yeah ir is awesome isn't it! They were genius's to come up with it. When you are gently moving your mouse to open the door it seems to simple, like second nature, yet so powerful.
I like your idea of being able to toggle it in the options. I assumed they could deal it out to the consoles (I bought this laptop just for Skyrim, but I originally planned to play it on the PS3) via a gentle push of the anologue stick.
Yeah, I'm playing on 360 but I guess you'll need to hold down A (provided that is the door opening key), and as you hold it down, you just open it with the right anolog stick while walking through it with the left one. Or just A (hold) + left anolog stick. Then, after having opened it, you can walk through.
Edit: I just tried to visualize it with my controller, and I think it might work pretty good. When you release A, you release the door knob. Whatever momentum the door has at that moment determines which way it'll continue, so if you want, you can just hold a at a closed door, quickly pull the stick down/left and release A. The door will slam open violently.