I have the theory that Highlander was caused by Gregory Widen wanting to write about people with long coats wearing katanas fighting in present day New York. He then had this excellent idea of inmortals fighting through different ages for a prize.

The first movie was very good. Astounding visuals, very cool sword fights and Sean Connery. Later they had to ruin it with parts two and three, which were absolutely awful. At least the TV series were nice, even if they didn't even try to be coherent with the movie; they ruined it again by mixing up the original movie and the series in the fourth movie, which was bad.