Since we are on a dating site...
I don't think many would list their bad qualities....
Kinda lessens the field of choice....right....
Bad qualities emerge as the relationship develop....
Then it's better to be up front so no surprises.
But not on the first date...right...hehe...
I think most people would hide them...hopefully for not to long....
But if there is an instant attraction it is very easy for you both to blurt out what they are...to get past that awkward stage...and then deal with them as they arise....
Me personally, I have one...well not bad quality...but it is a make or break relationship killer that I MUST air very quickly if I think we have a connection....
This is just common sense to not lead her on...