Have you ever learned somthing end ever since.................

Have you ever learned somthing and ever since then always spot it out even if you are not really looking for it... like some exsamples, fashion or the way to bild somthing a certin way or well im not sure im giving good exsamples. but like me... when i was 18 i moved in with a .long time friend and her boyfriend. he was into the roofing buisness, he was the sales men or whatever... he explained to me how to know wich houses to go to,when the best time to go around trying to sell foos, like okay you know when a roof needs to be replaced when there is dark spots coming from the top to bottum,that is water daamage, or obviously. green spots coming from the bottum to top. thats mold.
anyways. everytime im in a car now ever since im always looking at the roofs. and thinking to myself, yea they need a new one.lmao.
and when weve had like really bad hail storms and just a veaey bad winter all around.. right after is when you go selling,
anyways my question is.. have you eer learned about somthing one point in your life and its always stuck with you.and even though your not looking for it always seem to point it out??....