A big part of English culture is the concept of being sensible. The kids and I were invited over for an after-school playdate, and the I liked how the mom/mum reminded her kids to "be sensible" while playing. I've heard this phrase repeated at school, in the village, on TV... It's a phrase that we don't use much in the States.
Being sensible is an internalized idea. It is about having sound judgment, using reason, and simply making the "right", principled decision. The right decision is principled, so taking into account not just yourself but the greater good. You must be perceptive and intuitive.
I think that an American parent would tend to say, "Are you making the right decision?" That phrasing feels different to me, perhaps because it seems more proactive and conscious reasoning/thinking, a certain level of being rational and logical. It also somehow gives the child a sense of control and self-importance.
I see this subtle difference play out in the media. I recently heard a sad news report on BBC Radio 4 of a mother who murdered her two young children. Because she was diagnosed with post-partum depression, she was charged with "diminished responsibility" and the murder charges were dropped. Around the same time, there was an article on CNN about a similar situation in the US with murder charges pending. The handling of these two cases is very British/sensible in the first case and American/rational in the second. If you step back and look at the evidence, it is sensible to drop the charges. However, if you are hard and fast rule abiding, the logical decision is jail time.
In September, I was also struck by an interview on BBC of a cyclist who witnessed a shooting in France. The shooting had only happened a day earlier, and the witness was allowed to tell his full story to the media. The witness talked openly about how he reacted at the scene, what he did and should have done, etc. He obviously had no fear of implicating himself, being sued for saying too much or misleading the audience. The interviewer was very encouraging of how the cyclist handled the situation; there was a lot of trust that he did what he felt was right at the time and he empathized with him. The interviewer also did not use words like "alleged".
I find it very interesting that people are viewed as almost more "human" here. Hard lined rules are no match for sensibility.