I prefer characters that are obliquely autistic -- where the medium doesn't say it explicitly and leaves the viewer to their own conclusions. I get anxious when a character is described as autistic, because so many of those portrayals are all about *how hard it is to deal with autistics* or about *magic autistics* instead of being interesting stories about interesting people.
I think that’s a little bit of a double-edged sword, as it often is with a character of any kind of minority status. Because people will make assumptions, like how if a character of color isn’t in some way explicitly stated as such, white readers will assume the character is white.
At the same time, there are stereotypes and other problems to deal with when a character is explicitly autistic. Currently I think media representation is largely a lose-lose situation; either the representation is loaded with stereotypes, or it’s not explicit and therefore it’s questionable whether it truly counts as representation.