I only played sims 2 pets.
My brother had a dog, and his name was Champ. After weeks of loving the dog and buying the most expensive stuff for him, it ran away from him. My brother searched for days looking for him. I get on my family (we had cats) and every single sim day the dog would show up at my house and just beg for me to pet him. My brother was devastated when he found out his dog was cheating on him.
I also was the idiot who thought it would be a great idea to have too many items in my house so whenever someone opened up the stove to cook, a house would set on fire. I had a fire extinguisher but it was in the other kitchen, which led to my first death. After paying death $200, I revived and a couple days later every room started to have fires from other appliances. I had my first party celebrating my first raise, and almost all the guests died. After dying so many times, and being best friends with death, I decided to sell a lot of things, and have fire extinguishers in every room. My character was really depressed.
The good news: I never got rid of the hot tub, which was really great with all the ghosts outside trying to pay death money to be revived.