Macro and Depth-of-Field
Before I started shooting macro, I was generally on a quest for shallower depth-of-field. Deep depth-of-field was easy because of my APS-C cameras naturally produced it. It was more challenging to get super-creamy bokeh, especially with zoom lenses. But the Sigma 18-35mm solved that problem, and then the 50-100mm extended it into portrait and short-telephoto range.