Of course, I want to make as strong Pokémon as possible.
When breeding regularly, you can pass down 3 IVs randomly between the parents to the child. When holding the Destiny Knot, it passes down 5 IVs instead of 3.
So yes, the potential of the Pokémon you're breeding with effects the potential of the baby Pokémon in some way.
For more in-depth info, you can go here: http://bulbapedia.bulbagarden.net/wiki/Pokémon_breeding
I hope I helped!