The Biggus Dickus scene is one of the funniest scenes in movie history, but I think Life of Brian is not quite as consistently funny as Holy Grail.
It's also comic gold. "What have the Romans ever done for us?" Well, um... the roads?
I doubt a day goes by when I don't some kind of reference to a Monty Python film or show. Another highly quotable, funny movie is 'Little Big Man'. My #1 quote comes from that movie" :
"Well, sometimes the magic works, sometimes it doesn't."
He has a wife you know.
I agree with you, honestly — Holy Grail is a more coherent film — but LoB has some moments that just send me into the stratosphere laughing.
And I love the Shirly Bassey theme song.