My son is not an Aspie. He has high functioning autism. But they are similar. I will list a few symptoms most (not all) Aspergers/High-Functioning Autism (HFA) kids display.
1/GREAT rote memory skills
2/intense, focused interests, but not a lot of them. Often they border on obsessive and the child will talk of nothing but that interest and space out if somebody talks about anything else.
3/Social cluelessness (this one is almost universal)
4//Poor eye contact with strangers
5/Different behavior with peple the child is comfortable with and total freaked out, shy behavior with new people. On the other hand, some aspie kids are friendly without discriminating between those who know them and those who don't and they puzzle the other child who usually runs away.
6/Can have poor small or large motor skills (my son has trouble writing, although he's a good athlete)
7/Overly sensitive to loud noise, large crowds, touch, certain foods, certain material. My son overeats, but he will gag if he is given something that has an odd texture such as broccoli or cheesecake.
8/Worrying/anxiety (universal). They do not do well with change and need to be told about it in advance and eased into it. They get into trouble at school sometimes when they are ordered to stop doing one activity and that they MUST move onto another one. Some even hit or throw their desk. This is not ODD. This is Pervasive Developmental Disorder (PDD). Fear of change.
9/Some appear to have a flat manner (mine does not however)
10. Some don't like to be hugged or touched (sensory issues).
Most appear most normal when they are in their home environment or somewhere they are comfortable. You may even think to yourself, "I imagined it." Then the whole cycle starts over again, especially in a new place or when somebody demands they change what they are doing right NOW and start doing something else (major trigger).
11/Some kids sound like a "Little Professor" when they speak. Mine does.
Hope this helped.