I know of exactly two characters who were said to have AS:
-Wally Stevens, LAW AND ORDER: CRIMINAL INTENT
-Jerry Espenson, BOSTON LEGAL
I think both were a bit exaggerated, in different ways. Wally needed things to be in patterns of five, all the time (something which resulted in his crime being exposed). Jerry's mannerisms and vocalizations, plus his habit of keeping his hands on his legs at all times (hence his nickname of "Hands") seemed a bit over the top at times BUT as the series progressed, he got "better" at keeping such things under control (difference between a one-shot guest star and a character who ended up becoming a regular).
These may be actual AS traits, sometimes, for some people, but they were definitely exaggerated for dramatic effect.
League_Girl wrote:
All I know is we will never be happy about any movie or TV show with an aspie character in it. They will always exaggerate the symptoms or use stereotypes.
True, unfortunately. The same happens with other conditions (have you seen the way the various incarnations of LAW AND ORDER have portrayed schizophrenia?

).
Television and movies will always want to grab audiences' attention, and, as buryuntime said, if exaggerated portrayals of various conditions gets the ratings, then those kinds of portrayals will continue.
All that can be done to counter these stereotypes is real-world education.
_________________
The existence of the leader who is wise
is barely known to those he leads.
He acts without unnecessary speech,
so that the people say,
'It happened of its own accord.' -Tao Te Ching, Verse 17