Do you put “rules” on yourself?

Every time I play my game I am always doing something different. I have tried several times playing different challenges but get bored, because of all the rules.

No rules, I do whatever I want in my games. I do challenges, but will put my own spins on them.

Rule for myself though, is I'm under no circumstances allowed to play before bed.

sometimes
now my current rule is that I must do every achievement in my game with one family and I must have their ancestor complete every skill and aspiration and every descendant must die after getting a child to continue the family unless I'm doing career path with them
(because of doing 100 generations for that one achievement)

but usually my rule has just been mess up the whole city

It's my favorite thing about the Sims, no rules, no win/loose outcome. Probably why I can't do challenges, all those arbitrary rules.

I don't have specific rules for every time I play. I really set more goals and then will have rules associated with fulfilling that goal.

I have a few rules in my game. I play rotational.

1, First born child always inherits the family home. This is to make sure I'm not always favouring one sex over the other.
2, Each family gets played for one sim year before I rotate to a different one. I have my season length set to 14 days.
3, No cheating money. My sims can earn what they need/want or go without it.

I think that's it.

1. No cheating. I also like to have no stereo, computer or tv. I wanna find I guess harder ways to fill my sims' needs. So basically, always support more gameplay and never an easy way out. I hardly ever upgrade anything either. It's never boring like this as there's always something to do.
2. And some rules depend on sims. I make them act a certain way that I might not want to but think it fits their personality.
3. All heirs/heiress' and their partner who they had the next heir/heiress with have to (live and) die on my active lot so I can take their grave to the family graveyard. I don't always have happily ever after marriages so I have to make something up to make it into a story.

I don't feel uninspired or stuck with these rules as I play legacy and they fit well. I have never felt the need to try a different gameplay though as I've only had this one family since the release. I have plenty of freedom for my sim every generation.I can do whatever as long as those three a done.

I chose "average" amount, but my rule is there are no rules! Kidding. I don't cheat for anything other than to maybe fix something that's broken. Anything else is more my playstyle than any actual rules. Like I tend to be rather traditionalist in the Sims 4, not sure why other than the ease of doing it that way maybe. *shrug*

There are a few rules I go by. First of all, no cheating, since it would take away the fun for me. And there are certain events I always avoid because they're either broken or boring (like when I get invited to a birthday party).