RE: sentiment

You need to configure sentiment on words or phrases for it to be reflected.

Sentiment does not affect the bot's responses.
It is only available as an analytic, and available through scripting.

See,
https://www.botlibre.com/forum-post?id=21801950

You can also import this script with some common sentiment for English words.
https://www.botlibre.com/script?id=21509011

Bots also have emotions, which are reflected in the bot's avatar, and available from scripting.
For a set of common emotional responses you can import,
https://www.botlibre.com/script?id=14091442