I was diagnosed with undifferentiated attention-deficit disorder (DSM-III-R) in 1994 and fulfilled the "Missouri Department of Elementary and Secondary Education's (DESE) criteria for Autism" in 2002. Children with ADHD (combined type) tend to have higher performance IQs than verbal IQs; this was untrue both times I was tested. I also do not fit the ADHD stereotype of a student who doesn't learn anything in class because they are unable to pay attention or because they keep getting out of their seats and shout random stuff. The gestalt of my personality is quite different from the stereotypical person with ADHD,CT or ADHD,IA.
My impression of people with ADHD,CT is that they are very social, active people; they usually have a lot of friends; they also tend to be a bit more competitive than me. They are very trendy, often good at sports, self-confident, and somewhat rebellious or defiant at times. They enjoy passing their time doing "stupid" things (à la Jackass on MTV), watching silly videos on the Internet, and "hanging out" a lot. Of course, I am including with these ADHD,CTers the normals who blend into this disorder. These people often seem to wind up with drug addictions of some kind: smoking, alcoholism, or controlled substances. ADHD,CT without a PDD is the stereotypical ultra NT, in my opinion.
My impression of people with ADHD,IA is somewhat different; I don't really notice them much because, well, they're not as loud as the ones with more hyperactive-impulsive traits (who happen to be among the loudest and therefore most noticeable of all NTs). I would say the female ADHD,IAer might be the stereotypical ditz; she drifts off while you're talking to her or becomes distracted by what someone else is saying. Such people will not listen to an aspie's monologues for long! The ditzy ones are, of course, pretty social, too. Of the nonditzy ADHD,IAers, I suspect some kind of reticent artist or soft-spoken intellectual. These people tend to be more asocial and spend time in their thoughts (introversion). They tend to have fewer friends than the other ADHD types and may lack common sense.
I really don't believe ADHD is a unitary concept. It's really just a random hodge-podge of temperamental differences with a few aspects in common (i.e., modulation of attention and activity). These temperamental differences only get labeled as a psychiatric disorder because parents and teachers find the temperamental extremes to be a bit tougher to "manage" than most kids.
I would be more worried about my kids (when/if I had any) if they they weren't active, curious, a bit boisterous, and energetic. It's really pretty normal in kids; kids aren't miniature adults, after all, (and why should adults be stifled by narrow conceptions of mature behavior?). If they just sat around in their room all day, that would be bad.