I saw this movie at the theatre when it was first released, then bought it on VHS years later, then requested and received it as a gift on DVD later still.  I kid you not, but this movie and Casablanca are my two favorites of all time.  The only down side is that the movie ended too soon (with Arthur, Galahad, etc. being arrested by Bobbies).  If you don't like this movie there is something terribly wrong with you and you should seek counseling immediately.  It is, without question, the funniest movie of all time.  My favorite scene is the Castle Anthrax scene, but then, anyone who knows me knows why.