I'm not sure that you are getting my meaning or that I'm properly explaining myself.
A discussion like the
"Likes and Dislikes of Trek" because people will highlight things that they found annoying or ruining suspension of disbelief in the process isn't the same because it is done "afterwards" or "during" a project when sufficient material upon which to make an opinion. Plus, "disliking" elements isn't automatically "just being negative" if those opinions are formed fair mindedly and because a person is just negative "for the sake of it".
Actually creating problems to moan about is
just a negative attitude. I don't understand how you find a purpose in it (to get to know people better) because all people are doing is making up problems that exist in the first place. What else can you learn from that except "this dude is downer?".
EDIT: That last bit isn't claiming you are wrong, I'm just saying I don't see it and asking what it is.