I think sculpting is fun. The main advantage in Zbrush mini over Sculptris is the snake hook brush. That is a cool tool, though Sculptris has tools that can be used to give a similar result. Also, the mini interface is extremely simple. That being said, sculptris is still overall the more capable program. You can import obj meshes, export meshes, add spheres to increase the complexity of your model, turn the wireframe on and off, and so on.

I think a graphics tablet with pressure pen gives greater control over your mark-making process. The topology in these programs is all triangles. There is a freebie called instant mesh that does very nice algorithmic retopo. And your sculpting skills should transfer back to Blender.