Blender

I'm seriously going for it with Blender now - having tried and failed several times in the past to get over the steep learning curve involved in mastering this software, I now feel it's got simple enough to use that even someone as impatient as me can handle it. The above image is just me messing about with Blender's sculpting tools - there's something quite therapeutic about pushing those squishy lumps of pixels around, and, unlike with real modelling clay, you don't have to worry about the material getting grubby or sweaty between your big fat fingers.