It very much depends upon the context and the nature of the research. But in general some reasons why personal experiences are not research are that they are not generalizable but are unique to you and may not represent the broader population of set of situations. They can be influenced or interpreted through your own biases, and it is not really possible for anyone to verify the accuracy of your own experiences. In general research should be verifiable and repeatable.

However if you use your personal experiences as a starting point to design experiments to test the validity of your observations, then that would likely be fine.

You could mention it in the discussion (not in the data or results) as an empirical observation, which needs further investigation.