I like shallow depth of field because it isolates the subject from the rest of the photo. It gives you the opportunity to play with what you see, where the eye is drawn to.
It is one of the possibilities that makes photography so much fun.
Canon EOS 5D MarkII – EF 24-70mm F 2,8 L USM – ISO 200 – 65mm
F 4 – 1/1000sec – 2012, Apr.