Everyone has a favorite food, and they can like it for all kinds of reasons. Obviously, it could be the taste. It could also be a happy memory associated with the dish. It might even be a special treat provided by a friend. In this regard, food is not just about sustenance but also happiness. This type of love for food might also be observable in Naruto's eponymous main character.
Naruto Uzumaki loves ramen. Like a lot. He's constantly seen eating at Ichiraku Ramen with his friends and mentors. Knock on his door in the morning and he'll probably answer with a cup of instant ramen in his hand. When he introduces himself, the two big things he talks about are what kinds of ramen he likes and becoming Hokage. It's practically the only thing he's ever seen eating; if Kakashi didn't pop by his apartment occasionally to give him vegetables, it might actually be the only thing he ever eats. That and red bean soup. The Only other characters who can eat more ramen than Naruto are Yamato and Hinata. Finding out the reason or reasons for this borderline addiction will require a closer look at Naruto as a whole.