Amortentia is known to be the most powerful love potion in the world. This is a type of potion that smells differently depending on the person who will smell them. The person will probably have a preference when it comes to smell and it would be evident through this. Take note that while this is a love spell, this is known to be more of a spell that can produce a really huge infatuation.
For example, a person who has created the love spell can make another person greatly infatuated but not truly in love. Love is definitely something that cannot be made through the potions that are made in this world. True love can only be felt.