For example, my wife has a much keener recognition for something that's messy - a full sink or a shirt laying on the floor of my office will "scream" at her louder that it does at me. Although, I suspect the mess still "affects" me - eg I might be less focused/happy in the messy environment despite not thinking about it consciously.
Something completely wild is what my 3 year old sees. A few days ago I was stopped at a red light and he said "daddy, what are all these arrows?" My first response was "what arrows?" Then I saw the arrows on a sign that explained the intersection. Then I saw the arrows on the overhead exit sign. Then I saw the ones drawn on the lanes itself to show which ones can turn and which ones go straight. Then I saw the one-way street sign. Then I saw the red arrow on the traffic light. And probably a bunch more other stuff, including my blinker signal. So at the instant he asked me about arrows, I was consciously aware of 0 arrows, while in reality there were like 12 in our field of view. Now obviously this is because I've been driving for a long time and I don't need to be consciously aware of the arrows to process their information. But it also tells you how much we might omit / filter out because our minds don't think it's worth surfacing to conscious attention.