Don't people know that a game is full of dialogue before they buy it? The epitome of such a game is Planescape: Torment. The game has a strong and philosophical story and it has tons and tons of dialogue. In this case the dialogue makes up for a huge part of what makes the game so fantastic. The interaction with the NPCs, with Ravel, with your other incarnations and your own Mortality are so profound, so intense, that you just can't skip them. Even in the final confrontation you can get different endings based on your dialogue options, instead of just beating the hell out of the final boss.
Of course if dialogue or story is not what you're looking for, then you shouldn't play Planescape: Torment. Sometimes gameplay isn't everything [http://www.escapistmagazine.com/news/view/93222-Silicon-Knights-President-Gameplay-Isnt-Everything].
Of course if dialogue or story is not what you're looking for, then you shouldn't play Planescape: Torment. Sometimes gameplay isn't everything [http://www.escapistmagazine.com/news/view/93222-Silicon-Knights-President-Gameplay-Isnt-Everything].