In 1995 I started my own 3D animation, design and VFX studio. It was a Softimage house on SGI with a DEC Alpha render farm but I had a couple seats of 3D Max as well as Side-Effects Prisms and, later, Houdini.
I have used Cubicomp 3D, Bosch FGS-4000, Vertigo, Wavefront, Alias|Wavefront, Softimage, Prisms, Houdini, Maya and 3D Max packages as well as the Rhino 3D Nurbs modeler and several other long-gone packages including a 3D solids system whose name I cannot recall.
A 3D guru I am not, though. I regularly see stuff today that I just cannot imagine how in the hell was done and the insane skill levels involved in doing it. I will point out one thing that was common among the really good 3D practitioners: most of them are really good musicians in addition to being outstanding fine artists. The character animators generally had a drama background.
Now, I just mostly play around, doing the occasional explainer video/animation pieces and elements, usually having to do with automotive and aviation technologies. My old-ass brain can't keep up any more.
I remember thinking at the time that, had I had no prior experience to build on, I probably would have given up on it.