What you are describing is euphoria. It has many forms and is different for everyone, you say that it improves your mood and makes you nicer to talk to, that right there is euphoria. It is defined as 'a sense of well being' or something along those lines, depending on where you look. From what you tell me, it looks like the percocet definately gives you a sense of well being, especially if you are more pleasant to be around when you are on it. Trust Gramps on this one. What you are doing is misuse of the medication, you are also going to get addicted to them if you continue doing this. It will be a slow decline, you will slowly increase how many you take and it wont give you the same feeling anymore no matter how much you take, but you will take them everyday anyway. You will probably spend vast amounts of money obtaining them and maybe do things that you know are wrong, but you will need to get those pills, no matter what. You might get arrested for having them without a prescription. Who knows, but one thing is for sure. If you keep taking these percocet on a regular basis like you are now, not for pain, but to help you be 'a lot nicer' and to sit in front of the computer for a long time, you will certainly have some problems from it. I cannot stress strongly enough how bad of an option opioids like oxycodone (what is in percocet) are to treat psychological problems, they cause a false sense of well being in you, that is why you seem like a nicer person and you are able to sit at the computer, because you feel content. It is this feeling (the euphoria), no matter how subtle it is at the doses you are taking, that is so addictive and that you could very well end up chasing after the rest of your life.
I hope everyone has a pain-free day,
PS- Did you actually go to your doctor and tell him that you wanted percocet because it helps you concentrate and makes you nicer to talk to? If you did, I am just wondering what the doctor's reply was. I cannot imagine he was too thrilled about you proposing this idea.