I’ve decided that, as much as I admire it, I’m not a fan of the Nikon 105mm f/1.4. It really is amazing in terms of wide open sharpness, but the bokeh sometimes looks a little overdone… like the lens is trying too hard (if you know what I mean… and you might not). If you really want to go bokeh-crazy but want to do so in a refined and effortless fashion, the Nikon 200mm f/2 is superior, but this lens comes at a substantial size, weight, and cost premium.
The Nikon 58/1.4G is softer wide open than many modern lenses (and prone to missing focus), but has the best bokeh I’ve ever seen in a 50-ish mm lens. It is capable of producing very artful portraits. Highly recommended, but only if your subjects are relatively static. On another note, too bad — considering the price Nikon charges for it — that the lens liner is plastic (the constant removal and replacement of the lens cap can wear down the material ― you can avoid this from happening if you always have a filter attached to the lens as the lens cap will then attach to the filter threads… but this shouldn’t be a necessity on a premium lens).
The Nikon 28/1.4E is the best 28mm lens I’ve ever used (and, for comparison, I’ve used all of the modern Leica equivalents: 28mm Elmarit ASPH, 28mm Summicron ASPH, and 28mm Summilux… though my pick of the bunch when balancing size, weight, and image quality would be the 28mm Elmarit ASPH).