Anyone who has seen my Flickr photos will know I like to shoot lens wide open. That being, at their widest aperture.
My most used 3 lenses for model photography on the Nikon D800 are the Samyang 85mm f1.4, Nikkor 50mm f1.2 AI-s and the Nikkor 200 f2 AI-s. I also use a 35/1.4 and 24/1.4 amongst others.
But.. after all of that I think my taste is evolving.. I stop down the above lenses to meter light for some of the medium format film camera like the Contax 645, Mamiya RZ67 ProII and the Moskva-5. Some of the medium format lens are f3.5 or f4 widest aperture. In this photo I was using the 65mm f4 WA Mamiya Sekor leaf shutter lens so had shot the Samyang at f4 also.
Because medium format lenses give a greater shallow DOF I find myself stopping them down to get extra sharpness yet they are still super shallow.
I think this habit is now transferring back to digital and I find myself shooting the Nikkor 50mm f1.2 at f2.8 or f4.
It will be interesting to see how my stream looks in 6 months from now..