As for myself... It's the feeling of satisfaction when I finally get that data working the way *I* want it to!

Especially when it's something 'unusual', like turning a cylinder into a bathtub (see picture).

Note - Model created in Poser4 using 'morphs', separate props were then created and UV mapped with UV mapper. Custom Texture, Bump and Transparency maps by myself.

Image rendered in Poser 4, no postwork other than image cropping and format conversion.