I've recently started making an effort to do some personal art every day, and some of which has included sculpting in Sculptris. I've used zBrush 3 and Mudbox before... but Sculptris has really impressed me in how easy it is to start with a primitive sphere and just intuitively sculpt to your heart's content.

So, here's the first volley of speed sculpts that I've done, most of which are around 45 minutes, all starting from the default sphere.