Kim Jung Gi always blew my mind. I genuinely think his brain works drastically different than most people and his ability to visualize with such perfection is just almost inhuman. Really crazy stuff.
Yeah, to be honest I don't use vanishing points very often. At least not in the normal sense. Usually I'll place a sort of 'main' object in the scene, like a big shelf I want to have as a sort of focal point, and then draw lines from that to create my grid. But I'll still change it up a bit and add in more objects with varying rotation to them. If I just use vanishing points from the start I always feel like there's this uncanny valley sort of feel to scene, where things are too symmetrical, if that makes sense.