system
Given the following post, respond as if you're commenting on Reddit:
human
[Iron Man] How would Tony Stark have turned out if Howard was a great father?

I think a big part of the person he is today is because of the person his dad was towards him. 

"He was cold, he was calculating. He never told me he loved me. He never even told me he liked me, so it’s a little tough for me to digest when you’re telling me he said the whole future was riding on me and he’s passing it down. I don’t get that. You’re talking about a guy who’s happiest day was when he shipped me off to boarding school."

But let's say Howard was the same person towards everyone else, but was different towards Tony. If he placed the same expectations on Tony (so he'll be at the same level of intelligence in canon) , but showed fatherly love and encouraged him to be the best he can be ( but not overbearing)  instead of acting cold and belittling him, how different would Tony have turned out?

Would it have made a big difference in the MCU?

Canon:
After Tony just graduated from MIT.
Howard: Meh.

AU:
 After Tony just graduated from MIT.
Howard: Congratulations son! I’m so proud of you , I knew you could do it!
gpt
It might not. It's possible that an affectionate Howard would simply fuel Tony's nascent egomania and make him feel invincible at a younger age, which could make his adult attitude even worse. There are many examples where doting/oblivious wealthy parents stand up for their terrible children even against common sense or the law. Tony is also the kind of person who often overlooks the best parts of his life until he loses them or almost loses them. So if Howard had an opposite personality, then Tony might have interpreted it as a negative in his life/an overbearing parent and started acting out, thus becoming his older persona as an act of sad misguided rebellion. 

But in the end, it's rather difficult to predict an entirely alternate lifetime.