You're correct. Because a person only needs to have "two or more deficits in the following areas", that means that the "quirks" that one person has may not match the quirks of another.
My son is a very typical AS boy in many ways, but he does not have the higher intelligence that most AS folks seem to have, or the strict adherence to routines.
He is very obsessive, but unfortunately, about things that NO ONE that I know of would want to discuss! He is obsessed (and has been for about a year) with soda pop. He can name sooo many different brands and kinds of soda and which company makes them, even the ones that are discontinued! He can tell you what size of cans and bottles they are sold in and at what price at which store. Now how many kids want to talk about that? (or adults for that matter?)
He is one that changes his interests. Last year it was cars. That was a little more common, but still, children his age (young middle schoolers) aren't that interested in all of the makes and models of cars. He describes his infatuation with soda pop as follows:
"Mom, I've been Sodafied!"
I talk about it with him because I feel that I have to meet him where he is and not always demand that he come to where I am. I do change the topic frequently, though, and try to spark his interest on other thing.
So, you can be grateful if your special interest is more "normal", such as Lord of the Rings, Final Fantasy, or busses, trains, cars or planes! You can join clubs for these things but there are few clubs centered on soda pop! 
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"Honey, would you buy me some boobles for my 40th b-day?" "No way, they're too expensive. Your own baubles will have to do."