I really want a big family, at least 3 kids. My parents advise against it (even though we are 4 kids)
I'm not gonna be like the other dads, I'm gonna be a cool dad

But I would still discipline them when it's needed and never treat them as a friend, that's the biggest mistake a parent could do cause then kids think they can walk all over them.
On smoking weed, I think by the time I have even my first kid it will be legal nationwide so it wouldn't be that big of an issue. However, I would wait till I found out/they come to me first before I make a decision. And with drinking we start at an early age I'm a Latino household, if you show kids something is bad they're more likely to do it. My siblings and I have been around alcohol since babies yet none of us are drinkers.