Now, before you read this take, just understand that I don't hate my father. My father never put his hands on me or my mother. I love my father but my mother and I both know he needs help. I rarely make anonymous posts but due to this being a personal matter, I've decided to make this take anonymous.
1.) He's a smoker
I'm not a doctor or a psychologist but from what I've heard, Smokers tend be very grouchy especially when they run out of cigarettes. Occasionally he loses his cigarettes and raises his voice "where did I put my smokes!" and then gets in a argument with my mother. He eventually ends up finding his cigarettes and calms down.
My mother and I have tried to get him to quit smoking but it's futile. He keeps saying "I'll quit smoking pretty soon" but he obviously doesn't even try to quit. He smokes 2 packs in a day, which means he is spending a lot of money on his cigarettes. He's been smoking since he was in his late teens, now he's in his 60s.
2.) Likes to be by himself
My mother always asks me why I rarely talk to him, it's because he likes to be by himself. Whenever he's not working(weekends, vacations and holidays) he is either sleeping, on the computer, Drinking coffee, smoking, watching TV or just sitting at the dining table."
3.) Bad Hygiene
It's kind of embarrassing to talk about this but unfortunately he does have a bad hygiene. I'm not going to get into details for this one. This is obviously a emotional issue that he doesn't want to talk about.
4.) Misanthropy/territorial
This is something that I've barely noticed but he has made it very clear that he doesn't like a lot of people. Whenever my mother talks about someone she knows personally, he shows disgust and basically criticizes the person. He criticizes many people.
5.) Almost never shows sadness
I've never seen him cry. Even when my grandfather(his father) passed away, it had little to no effect on him. He didn't cry or show sadness.
The only time I've seen him sad was when one of our cats went missing(presumably because of coyotes), he even admitted to my mom that cried on his way to work. He really loved that cat, he still hasn't gotten completely over it and now hates coyotes. My mom even joked saying that he cares more about the cat than his family. Besides our missing cat, nothing has caused him sadness, his lack of showing sadness is almost like the terminator.
6.) Can't talk to him too much
Sometimes, my mother tries to ask him something but he often gets upset because whatever he is asked seems stupid to him. He then goes on a brief rant after he is asked certain things.
7.) Aggressive
He has a very bad temper and will road rage and on rare occasions get in heated arguments with random people in public for any little reason. Although he doesn't get in arguments with random people anymore because he's too old to risk getting into a physical altercation, he still road rages. Thankfully he's never gotten into a physical altercation though.
8.) Tends to forget things
This is what worries my mom and I, he occasionally forgets doing a lot things. If he's listening to music on the computer and raises the volume all the way up, he'll get startled when the music starts and will say "Oh, I didn't know you had the volume so high." even though I saw him raise the volume himself. 
9.) Stubborn
He's very stubborn, even when he's wrong he'll get very mad, he'll even lie. 
10.) Not honest
As I've said, he does lie but he also has kept many secrets from my mom and I. Not that long ago, we discovered that he has a daughter from his previous marriage. His first marriage was when he was 17. This daughter(my half sister) is all grown up and has a good career but we never knew about her.
11.) He might have a porn addiction
I have caught him browsing p%rnhub on a few occasions but I've never told my mom about this. She has also caught him browsing pornhub which has also caused them both to argue.
12.) Spoiled me growing up
As much as I hate to admit it and as unusual as this sounds, he did spoil me during my childhood and teens. He would always buy me stuff I wanted.
13.) Refuses help
Whether it be emotional help or physical help, he'll refuse getting it. Ever since I was little, he has always had bone problems from manual labor. He can't close his hands all the way and always asks my mom for shoulder massages. He refuses any chiropractic help. I do let him borrow one of my hand grippers(hand exercisers) to help him regain his hand Mobility.
14.) How all this affects my household
This causes a lot of issues, my mother is clearly losing her patience with him. They argue almost every weekened. The only reason they don't argue during the week k is because my dad works during the day, so he's not home to argue. Although my father isn't entirely at fault whenever both my mother and father argue, 60% of the time my mother starts the arguments and even goes as far as accusing him of cheating.
my mother admitted that she hasn't had sex with my father ever since I was born. According to my mother, my father has become impotent so they can't have sex with each other anymore. Obviously there are various treatments for that but I think my father is too embarrassed to get these treatments.
We rarely go out anymore during the weekends or vacations. We use to go out a lot, now we rarely go anywhere. My father did tell me that he wants to retire once he reaches 70 in 5 more years. I have to hurry up and graduate from college or find a well paying job.
My mother happens to be very impatient, demanding and also refuses to admit whenever she's wrong, so this is why she usually starts arguments with my dad.
Overall, it's not as bad as other households since we still manage to keep the family together but my family and I would live stress free if he tried to fix to these problems he has.
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