Inches vs pounds?

Just a general question, what do you find more motivation from, the scales going down or your pants size going down?

Personally while I love seen the scales go down the waist size is more motivating as I can see the real effects of it. A few months ago I got a pair of chinos 44" while at my heaviest. Three weeks ago I was delighted to get 40" pants but last weekend I got myself a 38"!

While this really spurs me on its going to kill my wallet buying new clothes constantly!