Lord of the rings is my favorite trilogy because it is so good which is what logical fallacy?

The statement "Lord of the Rings is my favorite trilogy because it is so good" exemplifies the logical fallacy known as "circular reasoning" or "begging the question." Here, the conclusion that the trilogy is a favorite is based on the premise that it is "so good," without providing any specific evidence or reasoning for why it is considered good. This reasoning is flawed because it assumes what it is trying to prove, failing to offer a valid justification for the preference.