Oh, come on, it was an awesome game.
All you people complaining that your choices didn't matter: Sit down and plot the story with alternate branches for every possible outcome. See how far you get before you throw your hands in the air and give up. Making a game like that is just not possible, period. At least not in the timeframe and with the manpower that Telltale have available.
And although I suspected as much from the start, the decisions were still hard and it was still fun to play through. I still felt I was playing MY version of the game, and it was great. I cared about Clem and the other characters, much more so than in any other game I ever played. I think if you are disappointed because of a lack of fundamental changes resulting from your decisions, then you're playing with the wrong mindset. But that may just be my point of view. I'm just sad that so many people are disappointed because of that. This isn't a role playing game... it's not even an adventure in the traditional sense, really. Frankly, I don't know what it is.

Interactive fiction perhaps. So thank you Telltale for an AWESOME game experience that is unparalleled. More please!
And on a sidenote... I for one am even glad there aren't many different outcomes. I don't have the time to play a game twice or even more often just to see all different branches of the story...