For positive feedback or general comments, please feel free to say whatever you would like.
For negative feedback, please only tell me about it if you think there is some way that I can grow/improve as a person based on the information you provide. In other words, if it’s something I can reasonably change/do differently next time/learn from, then please tell me. If it’s something I have no reasonable hope of changing/doing anything about/learning from, please think twice about whether it’s helpful or not for me to hear it. In conjunction with that, please be constructive/give suggestions/explain your perspective wherever possible, that’ll help me get the most from it.