Shifting What I Notice

"How often people betray themselves by what they notice in others."  - Rachel Cusk

My initial thought upon stumbling across those words several months ago was to pay closer attention to what I was noticing in others. Didn't take long to realize Cusk was onto something profound here. Now what?

My first step was to re-visit some earlier techniques I'd tried to quiet my judging mind. As in the past, I had some modest success for a time - some of the judging dissipated. But the noticing didn't. Next?

Why not focus on noticing the ennobling stuff? Using Cusk's formulation, by taking time to notice that stuff in others, doesn't it follow that I'd begin seeing more of it in myself? What downside could there be to shifting what I notice?