I never bothered with this before, but I'm going to give it a try now. My Sims have brought some really weird friends along recently, such as a Matchmaker. One brought someone they were so 'friendly' with they ended-up almost fighting. Before NL, one brought a nanny to a Greek house and she wouldn't leave, ended-up stinking the place out, falling asleep and blocking the toilet door, then eventually dropping dead of starvation on the front lawn. She would keep making herself meals so it took about 4 days. Had to delete the things in the end or feed them to the cow mascot.
It's too bad you can't boost their creativity and create a band out of them.
"The Stinky Nannies"