I had considered buying one of those new Sigma 85mm ƒ1.4 portrait lenses. I thought better of it and found a used Nikkor 85mm ƒ1.8d.
These are older lenses but the build quality and components are better, with less plastic than the new ones.
I used to borrow Ken's and love the bokeh, the fuzziness behind the focal plane. The d uses nine blades in the shutter diaphragm, the g seven and the older model's pictures looks more aesthetically pleasing to my eye. Click on Fred here and you can zoom in on a shot I took with it this morning at coffee.