Well, you can have the symptoms of ADHD without actually having ADHD. The final DSM criterion requires the symptoms to be clinically significant.

For example, I have enough symptoms to warrant a diagnosis of ADHD Combined. I have multiple nicknames from different people (Nervous boy, ADHD boy), and my fidgeting often causes others to yell at me. Plus, I'm so disorganized I have Post-It notes everywhere, and I still can't remember something important for more than 2 minutes. (My long term memory is amazing though)

Anyway, I couldn't be diagnosed as ADHD because it really doesn't impact me much. I have to double check about everything I do, but it's not a big deal. As for the hyperactivity, I think it's ridiculous that the sight of repetitive motion annoys people. I just try not to have my feet on other people's chairs.

It sounds like it doesn't cause you too many problems. I wouldn't worry about it too much. A diagnosis is just a label after all. If it does cause you problems in several areas of your life, you may want to consider medication though.