Might just be the greatest movie of all time, certainly my favourite too. I read recently that it was kind of the "Big Lebowski" of it's generation, with tons of quotable quotes, eg "You're gonna have to answer to the coco-cola company"
TBH I find Big Lebowski bit overrated compared to the other greats. It's a nice movie, no doubt, but not in the same league as Strangelove or Goodfellas or Godfather.