They are popular because Naruto and Hinata have a very endearing relationship in the original series. Fans love to see their relationship progress further, especially with romantic moments like a kiss. It gives a sense of closure and satisfaction to those who shipped them.
One great 'Naruto Kiss Hinata' fanfic is 'A Moment of Connection'. It beautifully captures the tender moment between them. The author does an amazing job of describing their emotions and the build - up to the kiss. It's set in a post - war Konoha where Naruto and Hinata finally get a chance to explore their feelings for each other.
The moment when Naruto first realizes his feelings for Hinata during a kiss is often a great moment. It's like a light bulb going off in his head, and suddenly he sees Hinata in a whole new light.
One common theme is the moment of realization. It often focuses on Naruto finally realizing his true feelings for Hinata after the kiss, and how it changes their relationship.
Some fanfictions might have the first kiss happen in a more unexpected situation. For instance, Hinata gets injured while protecting Naruto, and when she wakes up, Naruto is so relieved and grateful that he impulsively kisses her. This not only shows his deep care for her but also how their relationship can be spurred on by intense emotions and life - threatening situations.
One possible plot could be that Naruto and Hinata are on a mission together. During the mission, they face a difficult obstacle that they can only overcome by relying on each other completely. After they succeed, the adrenaline and the new - found trust lead to a spontaneous first kiss.