I use Blender. It seems confusing at first, but once you learn its ins and outs you'll never want to use another modeling program again (except perhaps to do things like vector line-art extrusion, which I use Cheetah3D for to make things like 3D logos).
If you're struggling with Blender, try out the
Blender Noob to Pro Tutorials. It has helped me many a time.