I haven't had any of those experiences, but as a nursing student in the hospital I came across one. As student nurses each week at clinicals we're supposed to "pick" a patient, talk to them, learn about them & their medical condition. The nurse told be that Patient in room x would be a "good" one since she has xyz medical problems, but she's bipolar so I need to be careful. When I went to patient's room I had prepared myself to encounter someone in a manic episode or depressed. I was pleasantly surprised to find a cheerful, helpful lady willing to talk about anything that could help me, the nurse, or her hospital care. Later that night when it was shift change the nurse I was paired with started to tell the incoming one that patient was bipolar so she needed to be careful and I interjected that patient was cheerful, easy to get along with, and very helpful.