Everybody has a type, and the vast majority of us will end up dating several if not multiple people to varying degrees before meeting the person that we'd potentially spend the rest of our lives with. As times continue to change and mutual acceptance between different groups of people increases it is becoming increasingly common to see relationships develop between people who are of a different background from one another. Even in this day and age there are still many challenges that this brings, but at the same time dating outside your background can be a very rewarding experience that can teach us all several very important lessons.
You will become more accepting of others
This one is a given. To make any relationship work, you'll first have to accept the other person for who they are. For many people, accepting someone of a different background is fairly easy, but to be able to pursue romance with that specific someone can be a whole new step outside one's comfort zone.
You learn to not care so much about what other people think
Even though in modern times the vast majority of Western civilization is open and accepting of interracial relationships, there is still a vocal minority of people who still find it difficult to adjust to. Heads still turn, and in my personal experience I've even been spat at for holding hands with a dark skinned girl. Over time one learns to not let things like this get to them, at the end of the day only your opinion matters to you.
You broaden your horizons
Not everyone in the world is the from the same background as you. Opening yourself up to people of different backgrounds increases the amount of options you have, and in turn increases your chances of finding the right person.
You give yourself the opportunity to explore a new culture
Exploring and learning about a different culture is always a positive experience that is not only interesting, but makes you a better and more well rounded person in many ways.
You realize that at the end of day, love is all that matters
When you truly love someone, it's the individual that you fell in love with. Not what they own, not where they come from, not their skin color, but who they are and their raw personality.