Men over 60 are more mature and this makes them attractive, even for younger women. They are less likely to be complicated and women like this about them. They are able to handle everything in a mature way and are less likely to cheat as younger men do even when they are in good relationships.
They have more time in their hands to commit to dating because they may not have any professional commitment. To the dating man it means more time hunting for the perfect woman and enough time to enjoy her company.
The bad
So much is expected from a man dating over 60 in terms of behavior. They are expected to behave in a certain way and anything short of that could end up getting them misjudged as bad people or cheap ones for that matter. It therefore might be harder to develop a serious relationship for men with certain personalities.