GameSetWatch is running a feature discussing the value of graphics styles in games. The authors point out that while certain genres, such as first-person shooters, benefited immensely from the advent of 3-D graphics, some types of games didn't handle the transition as well
. A player's perspective, and his interaction with the game's camera, can often make or break an otherwise excellent release.
"Before making the full jump to 3D, many genres made a move from classic 2D to isometric 2D as an intermediary step. For example, the original Civilization had a traditional top-down grid view while Civ 2 had a three-quarters isometric view. While this new perspective gave the game world a more life-like appearance, the change did come at a cost to the user's game experience. Namely, distances are much more difficult to judge on an isometric grid as the east-west axis takes up twice as many pixels as the north-south axis. To solve this problem, for Civ 4, our 3D perspective actually hearkened back to the original game as we showed the game's grid straight ahead and not at an angle. The easier the players perceive the grid through the graphics, the better they can 'see' their possible decisions."