1)  "I don't need another modeling program, I can make that with primitives."

2)  Several hours later, you save your work because you are too frustrated with the current item, then check your first save to compare:  It is almost exactly the same and you still dislike both.

3)  "Bah.  I'll just buy one, but I know I can make this other thing . . . "

4)  Loop 2 and 3.

You pass a cute girl in the mall and say to yourself "I'd like to render her," only to have security following you because you said it loud enough and he thinks you want to boil the fat off of her.  x.x