Approval of the parents
It is normal to want to be popular with your prospective in-laws, but be open to the fact that you may not fit like a glove with them. Do not expect to build an instant bond with them, but instead try to help them feel at ease, with you opening the door for a warm encounter the next time you happen to get together.
Be yourself, assert your personality and do not fake it. Be careful though so your sweetie’s parents don’t take a dislike towards you in your very first encounter.
They may never accept you if that ever happens. And even if they do, it may take a long time. They are just as anxious as you are and will be thinking the same questions as you. They are, after all, losing their “little child” to you.