When I came off my last relationship, one of the considerations in my deciding to take a nice long break from dating is the fact that, to be perfectly honest, I was lousy relationship material, myself. Just as we sometimes get annoyed by people who arrive into our lives with a ton of baggage, we should consider the feelings of those we inflict OUR baggage on.
That doesn't mean we are "damaged goods" and are forever saddled with the baggage, but we should at least give ourselves a chance to recover from the bad relationship we left so we aren't lugging it around inflicting it on other people.
In short, I think BOTH parties deserve someone who's not still grieving or carrying around the consequences of the last relationship.