Tom Cashel said:
You know what? To say that the D20 rules "encourage" role-playing is just as absurd as saying they "discourage" role-playing. Either statement is a value judgment, and does not gain validity when used as a checkmate.
As a DM, I feel that the D20 system--especially in its most recent incarnations--reduces the role of the DM to arbiter. Overseeing an arbitration between the rules and the players, that is.
Not at all -- rules that are simple, make sense logically, are consistent with each other, are easy to predict even if you don't actually bother to look them up everytime you need them, etc. certainly do encourage roleplaying, because the rules become very transparent, and you don't have focus on them during the play session. That's not absurd, that's self-evident, in my opinion.
Now whether or not you see d20 in that light is probably the real question here. I do. I think 3e is easy. I've read through the PHB once, I brush up on the combat options if I haven't played in a while, and I don't particularly care for playing spellcasters. I
never have to spend time consulting the books during play, either as a player or a DM (except for the rare occasions when I am playing a spellcaster, 'coz I don't know jack about casting spells.) You wanna try something in my game? OK, make a xxx check (DC on the fly) and off you go. It's so easy to wing it in 3e that it's not even funny. We never get bogged down in rules discussions, except with new players, or players who are playing character classes that they don't very often (said spellcasters being a notable example), we never have to put much thought into the rules, they support our roleplaying rather than hindering it.
The same could not be said of prior editions of D&D, certainly. I've also found the system much more elegant than the dice pool mechanics of systems like Storyteller, which bog you down as you try to figure out what you're actually capable of, to say nothing of couting up all those freakin' dice.
3e facilitates roleplaying more than most systems that I've played for any length of time at all.