Well, okay.
The movies all feel as if they part of a really large story, which I think, is a faithful recreation of the books: this sense of grandness and an epic atmosphere of undertaking an impossible task have transitioned rather well into the movies.
The fight scenes are also pretty cool, as are the effects: the clever mix of both practical FX and CGI has allowed for the movies to age rather well.
In addition, I think that the pacing is magnificent. Yes, the movies are 12 hours long in total(about 14 for the extended editions), but each movie is so full of events that you don't get bored, and it immediately satiates your wanting for progression. Simply put, it simultaneously satisfies you in between movies, and leaves you wanting to watch the next part, and it does it so well that I haven't seen another movie(or series of movies) rival it in that regard.
Apart from that, the story itself is pretty cool. It's a tale of togetherness, camaraderie, bravery, unity; it's a really nice story that simultaneously depicts the horrors of War and the unity of mankind in the face of adversity. It doesn't have some sort of ulterior motive, and for all the claims of racism, the across-the-board whiteness of the cast(and in the book) wasn't deliberate, it was more of an afterthought for both writers to diversify the cast(besides, it only became a problem when actors of other ethnicities were actively rejected for the roles like in The Hobbit, which is close-minded of the casting directors, but I won't go into that territory here).
And to me, at least, its a cultural touchstone. It was the early 21st century's Star Wars(original trilogy), and it is immensely popular.
It's not going to be the greatest movie you will ever see, I won't fanboy about it that much, because that can ruin the experience for people, but I will say that its a solid story well told, and you should see it because of that.