Like if someone who went through a depression, trauma, or something else in life, would have a better (romantic) relationship with someone who went through similar things, since they can relate and know how to console,understand and help their partner?
Or is it better if one of them had a perfecly happy childhood, upbringing and life, since they don't have "emotional bagage"?
(I've found that "happy life" people can sometimes ignore if someone mentions having a flashback or something, like it wasn't anything important, and not be as comforting as someone who dealt with struggles, who care more about others feelings)
(I find this this interesting^^)