I don't disagree with any of the statements made thus far; however I think there are a couple more reasons why a lot of folks are shooting with a shallow depth of field. First of all, bokeh can be absolutely beautiful. Everyone knows this but I hadn't seen it mentioned in this thread. It's simply visually appealing when light, lens, and sensor play nicely, which brings me to a second reason: bokeh can be unpredictable. Almost like a gambler whose brain chemistry is chained to the highs and lows of winning and losing, shooters rejoice in the unexpectedly stunning bokeh that bestows the ineffable.