I like "clutter" because it makes the room look more lived in and realistic. Although I try not to overdo it because of lag issue. And its really important to playtest a build to make sure your sims can use the objects you need them too. Sometimes clutter can come in handy! My sims LOVE to do all their meal prep on the counter in the bathroom next to the dirty toilet and wash dishes there too. I found adding clutter on bathroom counters prevents that. Also if your sims like to wash dishes there too, add a mirror or even better, the medicine cabinet over the sink. They will tend to reroute and use the kitchen instead. Just make sure to keep at least one kitchen counter free of clutter and the sink accessible.