There are several reasons why Avatar: The Last Airbender became the iconic cultural staple it is today. The Nickelodeon series boasted rich world-building, intricate character relationships and development and an easily understood power system. All these factors along with relatable and memorable characters made for several of the most intense moments in fiction. Though Avatar was at its best in quiet character-driven moments, it could certainly get as hype as the best of them when the situation called for it.
Source:https://www.cbr.com/10-avatar-the-last-airbender-moments-that-always-hype-fans/