I think when students "overshare" that could be seen as unprofessional, not very adult, whatever. I don't do that & try to keep class discussions on topics not related to me. I think when people relate everything to themselves and only talk about themselves, it comes across as self-absorbed. I don't know if its normal to become emotional during certain discussions or not, I guess it depends on what the discussion is about. I try to remain detached and just stick to the topic and not tell things about myself. I don't think anyone needs to know about my personal life and I don't have to tell them.

I want to establish rapport with my professors and am working hard on that myself.

Problems I've had in the past as an undergraduate (years ago when I was younger) included over sharing with my classmates. Big mistake. I used to get nervous about tests and homework assignments, and my other classmates figured that out and exploited that weakness of mine. I never, EVER let my classmates know I am nervous or anxious about tests and homework assignments, they might just choose to gossip about me to the professor. I think it is crucial to appear confident about the class subject and how well I can do in the course. I do not trust other students, period.

If I can't get into a study group with other students, I then I make it a goal to study much harder for the tests and usually do very well on them. If I am doing well in the course, the professor usually maintains some respect for me as a student. Not always but most of the time. I've had personality conflicts with a few professors and some were, to be honest, completely unavoidable. Sometimes a professor just doesn't like a student and there is nothing he/she can do about it. In my opinion, some professors have biases against older students. I am over 40 now and honestly, if some of my professors knew that they'd probably have a problem with me. I don't tell them.