I Have Attention Deficit Disorder (ADD)

Have you ever noticed that most people don't pay attention or focus? I have always struggled with Attention Deficit. It's hard for me to focus well, but the more I'm around people the more I see that most people don't pay attention. I work with the public and often have to repeat myself over and over to get my point across. They don't pay attention to what's right in front of them. They can't keep up with anything. It seems most people just space through life. I am not being all that critical of people, I'm just making an observation. Although it irks me they way people expect kids to stay focused but can't or won't focus or keep up with anything themselves.