My 11 year old son seems to have a serious personality issue and I don't know if I am overly concerned.?

My 11 year son has always had some behavioral issues and seemingly antisocial tendencies. His father and I are quite moral considerate people as well as his little sister, however he is very self serving. No matter how many long hours and days we have spent trying to explain to him that things he does are rude and inconsiderate, he can't help but turn around and do them all over again. I don't think he means to do a lot of things he does. What I don't understand is why he isn't learning from his mistakes.

He tends to bother people, pester people, knock on the door while your in the bath, be right up in your business all the time, he won't play by himself and rarely stays out long. He messes with peoples things and often breaks them. He would bother you or anyone day or night if he felt like it and has. He will ask anyone for anything over and over until he gets it. Manipulator.

Is this in anyway normal for some people or kids his age that have attentive loving parents? I know I never acted that way or wanted to use people when I was a kid. I didn't want to be around my folks all day. We can tell him to go out, lock him out, whatever. He would rather bang on the door or sit against the door for hours than just go do something else.