Reading the other comments, this seems to be more of a cultural thing than something based on facts. Ibuprofen seems to be taken in more serious situations. Personally I’ve never had it so I’m not sure. Paracetamol is more of a casual thing here. Many people, like me, would only take it when very ill. But I’ve definitely had a few classmates or colleagues who just take paracetamol whenever they have a slight headache or something.