I'd have to go with Star Wars but LOTR is cool too. Star Wars has more action and has more movies and they're not dull. 'Cause one time we had a LOTR movie marathon and I slept through 1/2 of 2 and a 1/2 of 3.
Star Wars was kinda a rip off. It used traditional Samuari stories and many archtypal characters. It wasn't as original as LOTR. PLus Tolkein was a genius.