I've been fascinated with 3d art for over a decade. I started using it to create 3d scenes for 2d illustrations. It was just a cool way to work.
With Virtual Reality here and Mixed Reality around the corner, I'm becoming more and more obsessed with it.
ZBrush is my weapon of choice. I use various tools for various tasks, but I mainly use ZBrush for 3d art and Unity for gamedev.