I was diagnosed with ADD when I was in 5th grade, this was way before ADD was even know to most people. Not like now were almost every kid in school claims they have it, when they are just lazy.

I understand were your coming from but its not really ADD. ADD effects most in shorter amounts of time then what I think you are talking about. Like sitting in a class for 3 hours someone could exp. ADD not being able to pay attention to the material but on a very normal basis. Most of the time ADD dose not have much to do with someone that stops doing an activity that they have been doing for awhile. You just have become less interested in it and its really has nothing to do with your ADD.

Reason I say this is I have the same problem with doing things for long periods of time. For a long time I raced nitro RC cars but after a 3 months lost interest and decided to do something else. Running, Swimming, biking, and soccer have only been the things I have kept up with for long periods of time. Soccer being the longest playing since I was 10. So yeah you have just lost interest and u want to move onto something new. Its pretty normal.