I know that you would have to be medically evaluate, but the problem is that my dad has traditional Indian views and considers it a stigma to have an disorder (even though it may not be considered as one), thus his ego is preventing him from getting diagnosed. I have read many articles and all of them have different symptoms and says that symptoms vary. Here are some of my dad's quirky traits:
-He is never late in making payments (bills, rent, etc)
-He is obsessed about Bollywood movies and its trends (highest grossing film, actor facts and rank)
-He sleeps on this sofa he considers lucky for him (makes all his important decisions after sleeping on it). I once threw it out and he is still angry with me till this day. He has been facing hardships and blames me for creating them by throwing his sofa out.
-He always sticks to the same type of clothing (South Pole shirt and dress pants) and most of the time goes weeks wearing the same clothes.
-He has a favorite daughter and is very obsessed with her. Protects her when needed.
-Obessed with double checking things (locks, letters in envelopes, etc)
-Repeats and says the same things over and over
-Is very angry at irrelevant things for years (brings old issues up from 20 years ago). Holds grudges.
-Verbally abusive
-Has verbal diarrhea (doesn't know what to keep to himself)
-Has zero friends and hates social situations.
-Doesn't know how to talk to people. Messes up deals. Over talks all the time.
-Never thinks he's wrong
-Makes lists
-Isn't dishonest. Tells white lies occasionally.
-Hoarders junk
-Doesn't know how to keep things clean and organized