You need to consider the fact that game length expectation differs from genre to genre, you cant really blanket this opinion across all game genres. For example, Portal was "short" but as an FPS with puzzle elements it was the perfect length and refrained from getting boring by being too long. On the flip side, Baldurs Gate 2 was a lot longer and rightly so - it was an in-depth RPG, which relies heavily on a good story line as its main appeal.
In FPS games, I generally dont expect a game to be too long, I just want something I can quickly hop into for a bit and have a laugh. With an RPG however, I expect countless hours of fun and exploration.
In FPS games, I generally dont expect a game to be too long, I just want something I can quickly hop into for a bit and have a laugh. With an RPG however, I expect countless hours of fun and exploration.