Honestly, I only read the first couple pages of this thread, and just as I suspected it's one of those "Man, I'm gonna pick a film everyone loves and say I only kinda like it so I look DIFFERENT ON THE INTERNET" threads.
The Dark Knight is not overrated. I do believe it was mentioned earlier, but it's a return to form for films. It's not focused around shiny special effects, it's focused around the writing, the acting, the atmosphere. To the guy who said WB capitalized off of Ledger's death, you're wrong. Well before he died the Joker was already a heavily advertised aspect of the film, and he was a controversial choice that was garnering a ton of attention.
Also, to the guy that listed Citizen Kane along with films like The Matrix, Transformers, and a Scanner Darkly, you're just an idiot. You don't get to name what is easily one of the best films of all time with a bunch of mediocre to entertaining movies and then make a few sweeping, generalizing statements about your list and expect anyone to believe a single damn word you're saying.