Hello Matty.
I am a Flight Attendant with a very large American Airline and fly regularly with a couple of Captains that I know are on the spectrum but very savant & HFA.
So, no they are not the greatest at shooting the breeze over a cup of coffee, or a martini on a layover, but may I say, I always always adore flying with them, as they exude professionalism , logic, detail to safety and adherence to procedures.
And know For sure, that in Case of an emergency, emotions would not kick in, just pure thinking out the box and feel safe that any decision they would make, I would make it back home in one piece. GO FOR IT!!!!