"I've not seen it, but I think people who have are blah blah blah..."
The thing with Star Wars is, it was made in 1977. It's easy to be jaded now when sci-fi films are ten a penny, but at the time there was nothing really like it. The fact that it still stands up today (even the theatrical editions) is is pretty much unique for a genre film.
Star Wars came out in the UK just before my sixth birthday; I'd have been eight when I saw Empire and would have watched Jedi when I was eleven. If you cut me in half, it'd read "Star Wars' target audience" through me like Blackpool rock. If you've never seen it before then even if you were to watch it for the first time now, you're aged 30-something and probably know most of the plot developments; you probably still won't get it.
For me, in adulthood, meh, it's just a decent series of movies. They probably wouldn't feature in my top x all time favourite films list, I don't have a cardboard cut-out of slave-girl Leia, and I've never owned any Star Wars figures (unless you count LEGO minifigs). I'm not a "fanboy," but I'd respectfully suggest that it's somewhat short-sighted to deny that it was anything other than a milestone movie.