Started CG in 1999-2000 at last year of high school with caligari trueSpace and Bryce3D (!!), then switched to max 5 at university (Radiosity and Light Tracer, they were like science fiction to me). Since 2005 started using vray, then in 2007 switched to Mental Ray, then another time to Vray this year due to inefficient light solutions during my thesys project (lot of indirect illumination and particular light condition, in the future I will make some tests with Corona...).
I'm 23. I remember playing (literally!) with caligari truespace on a 166MHz pentium when I was in primary school. It was one of first 3d graphics apps I remember. Next ones were Bryce 5 (it was amazing), Poser, Max 5, some early versions of CAD (I'm not sure what it was but I remember makings lathes from splines and "baking" them as bitmaps). I'm proud to live in times where computer graphics achieved such progress.