f/1.4 is just setting on the lens that you may use when the situation calls for it. If you don't like the effect for a particular subject, you can try other apertures or work on a different composition. Usually the best image quality is obtained stopped down a bit. This is true of most lenses. If anything, the 105/1.4 handles shooting wide open very well but that doesn't mean stopping down won't improve it. In any case the depth of field should be chosen to suit the subject and composition and not always f/1.4 will be the best, obviously. The swirly bokeh is apparent in some images, but mostly not, so even if you don't like the effect, there are plenty of uses for the lens.