Put 2 Havanese together even with different personalities and eventually they will bond. Put two similar personalities together and soon they will be playing like banshees and give you a ton of smiles and a few shaking your heads at the nonsense.
That's why it is important to us when someone wants to acquire another pup to match personalities with the existing dog as well as the owners.
We have way too many that say I like x colour and they 'get' the personality aspect but don't fully grasp it unless they are matched with a dog that doesn't fit their household but happens to be the colour they like.