---For example, I am modeling now in Wings3d, and sincerelly, I don't chage wings3d for any expensive program like max---

I think it depends on what you're used to work with: I've made my first 3D-modelling in Autocad, which was a crime to use, later I worked with Rhino3D because it had a similar interface like autocad (eight years ago, now it's completely different!) but a much better way of 3D-modeling. I've tried wings3D, anim8tor, cinema3D, blender  and some other programs... but I've always returned to Rhino because of the trusted feeling it gives me. I know Rhino isn't cheap compaired to WIngs3D, although much cheaper than MAYA or MAX, but it is a tool which I love to work with: it gives the right precision I need as an engineer, but it can also gives you a more satisfying organic approach to your work. On the other hand it lacks any support for character-modelling, so Poser is a good partner, E-frontier has even made a free Rhino-export plug-in. And I think that with the new Rhino4 upgrade, which has a lot of more mesh-support, it will only be better.
I liked wings3D because it's easy to use, but if you don't use it on a regular base , (which counts for every other program) you forget the basics.

-How can you improve things when you don't make mistakes?