My first real relationship which actually a couple months ago, the guy had went through a tough childhood with his father I guess, and had mental effects on basically now who he is as a person. He was a very nice guy, well put together, but sometimes when problems came up, hence an arguement or trying to solve a situation, he often enough would be calm cool and collected, but once he broke, he really broke.. It was often scary and a bit traumatizing mainly because I had no control over it. Anxiety attacks, shaking, heart pounding and his inability to control himself for that matter really, really effects the other person in the relationship also.... Especially one who really cared for them.
I guess it really depends on the person, some people may not even matter, and can handle situations very well. The other which might have been said before, would if they cared enough about the person, would handle their baggage to care, and love for them. Personally I wouldn't mind or close myself off to any kind of person because were all beautiful people in our own bodies. Everyone has their issues whether it be with theirselves or something in the past.