I've spent the last week exploring gpt-3.5-turbo. Went back to text-davinci. (1) gpt-3.5-turbo is incredibly heavily censored. For example, good luck getting anything medical out of it other than 'consult your local medical professional'. It also is much more reluctant to play a role. (2) As is well documented, it is much more resistant to few-shot training. Since I use it in several roles, including google search information extraction and response-composition, I find it very dissappointing.

Luckily, my use case is as my personal companion / advisor / coach, so my usage is low enough I can afford text-davinci. Sure wish there was a middle-ground, though.