I learned a long time ago not to make exclamations like, 'isn't this great' and 'aren't we having a lovely time?' on family trips. Even if we are in Disneyland, I know that such exclamations are likely to induce an unenthusiastic response that doesn't just rain on my parade, it pours.
Last summer we went to London for a couple of days. We had a lovely time. On the way home I overheard the following conversation:
Jo: Alice, what did you like best about London?