I agree I like Netflix a lot. $8 a month is a bargain compared to pretty much every other option.
I am going to go see the major "Block Buster" titles I am actually interested ( maybe three of four a year ) at the cinema with buddies; those are social events and quite honestly, (/me ducks the incomming flames) movies like Avengers while good are only great out with pals. Take the social component away and try watching the film alone in your living room and its far less compelling.
Maybe its because I don't generally watch movies for the sake who can show me the most photo real destruction of NYC and the occasional boom mike or obvious cardboard cutout in the shot does not ruin the suspension of disbelief for me; but I find that many of the Indie stuff Netflix offers me is just as entertaining as the AAA stuff Hollywood churns out. In the end that is what I want out of it to relax and be entertained.
Rating everything definitely helps you get good suggestions and the flat rate all you can eat model makes it safe to take a chance on something. If after 30min you find you are not enjoying a flick switch to something else and you are not out anything more than a little time. Even placing $2 bets on iTunes or something you could easily exceed the cost of Netflix without having had much fun to show for it.