Celebrim
Legend
Some.
Rules matter.
But how you think about and how you prepare to play a system is more important to determining how a game plays than the system. This is because the rules of the game are only a small part of what makes the game. Very important procedures that people engage in without consciously thinking about it are usually undefined in the rules (and certain undefined in all editions of D&D). Likewise, what constitutes the game itself - what D&D thinks of as a module (of play) - is not expressly defined by the rules. In this way you see huge divergence between two tables running the exact same rules (to say nothing of D&D's tendency to acquire house rules). It's quite possible to have 1e and 3e tables that have more in common with each other than they do with other tables with the same rules.
Rules matter.
But how you think about and how you prepare to play a system is more important to determining how a game plays than the system. This is because the rules of the game are only a small part of what makes the game. Very important procedures that people engage in without consciously thinking about it are usually undefined in the rules (and certain undefined in all editions of D&D). Likewise, what constitutes the game itself - what D&D thinks of as a module (of play) - is not expressly defined by the rules. In this way you see huge divergence between two tables running the exact same rules (to say nothing of D&D's tendency to acquire house rules). It's quite possible to have 1e and 3e tables that have more in common with each other than they do with other tables with the same rules.