Ironically, I probably fall into level 2's definition insofar as fixations with special interests go. If I'm *really* into something & the building is on fire, I'll tell the firefighters to come back when the flames are licking my desk 
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Your Aspie score: 170 of 200 · Your neurotypical (non-autistic) score: 34 of 200 · You are very likely an Aspie [ AQ=41, EQ=11, SQ=45, SQ-R=77; FQ=38 ]