1 {scene: an English pub}
1 Jane Goodall: Mmm. I love a good, dark, bitter.
2 {Jane takes a sip of her ale}
3 Pub patron: {walking by} It’s funny, that’s an ambiguous statement, you know. You could be talking about beer... or chocolate.
4 Jane Goodall: I’m actually talking personalities.

I appreciate bitter flavours a lot more now than I did when I was younger. I think this is a common thing as people mature.

There are a few popular articles on this, as well as many academic ones.

Interestingly, many of the academic papers about age-related flavour preferences are either focused on aged care factors, such as providing nutrition in nursing homes, or are sponsored by the tobacco industry.