Harry Potter and the Goblet of Fire question

Because he is.

But for real, I think everyone loves him because he's so honest and acts so realistically. He confides in his friends and lashes out like many teenage boys, and he's really great at defeating Dark things. He just has qualities that make him likable and fun to watch/ read about.

Because it is a unique series that can relate to actual struggles and it really just has a very interesting plot. It will keep the reader on their toes and makes you wanna read more!