Normally, I don't, as I just find the illnesses annoying, but last night I had a sim go out to eat with her dad and it took so long at the restaurant, she didn't get home until 2am, and she had to work at 6. On top of that, she ended up getting food poisoning. Once I realized she was sick, I decided to give her the day off, thinking the food poisoning would last at least a day, so it would be worth it, when, in reality, the illness only lasted about 2 hours, so she essentially wasted one of her day's off. So, yeah, sometimes I do kind of wish they were longer.