We always remember the bad ones, because the trauma from loss of time and energy is there to try to prevent the same pattern.
The problem is our thirst always blinds us.
As for better guys and what not, they may not be as observable because they are working and having a life and have limited time and energy just like yourself.
So I wonder if a better weed out question for folks in the dating to mating dance is:
So what did you do and accomplish this week?
Then see what the actions of a person says versus the words and fake puppies ...