I used Max and Rhino and must say:
I started to hate max, they never rebuilded it from zero, what i mean is, the menu´s are in no order, the whole program has no structure ...
rhino is quite good - but hasn´t got polygons, only nurbs (it is rather for CAD - users anyway)
maya - great! When i first came to maya - it was amazing - from the first secound on i felt familiar with the menu´s the structure and the whole program ... maya is like a sailing boat (if you have ever been to one) ... it all makes scence
but anyway, everybody has to find his own 3D-Proggie, and in no Studio maya looks like mine or your maya, my maya looks (and is) different because of my personal scripts, settings and interfaces ...
so everybody needs to find and build his own WorkingArea