Falling in love with the right person is one of the best things that can happen in your life.
A relationship is comprised of parties with quite diverse opinions, goals, beliefs, and even behaviour. Though there are certain things you can convince your partner to change, you can't change these four things about them.
1. Their relationship with their family
One's family cannot be taken for granted. If you do not get along with your in-laws, don't force your partner to change how he/she relates with her family members. It is important to allow your partner to enjoy the relationship he/she had with their family before they met you.
2. Their personality
Always be aware of your partner's personality. Be keen to learn your partner's personal traits. It is quite difficult to change them into what you may prefer. Some of these traits have genetic influences thus are very hard to change.
3. Their lifestyle choices
You shouldn't force your partner to adopt a certain lifestyle just because they are in a relationship with you. For instance, you don't expect a partner who is a vegetarian to start consuming meat simply because you love meat. Accept your partner the way they are and learn to respect their lifestyle choices.
4. Their hobbies
What your partner enjoys doing might be quite different from what you might like doing. Asking them to change will be difficult as their preferences may not fit into yours. Give your partner space to do what they love.