All right, let's try this once again for people who are conflating what I've said with what others have said, or just haven't bothered to understand what I've said because I'm yanking on the ears of D20 Bessie, their sacred cow.
D20 has a lot of rules. The fact that the DM sets a DC for skill checks is true (and a simple, straightforward mechanic at that), but does not change the fact that there are individual rules for half-a-billion Feats, Skills, Spells, Magic Items, etc. etc. etc. Players prefer their DM to follow the rules as stated in the books (don't tell me my players are the only ones--threads pop up all the time about DMs supposedly drunk on their own power and playing havoc with the rules). Players have more time to study rules than DMs--DMs are expected to come up with a scenario and NPCs, consider the possible results of PC actions, and possibly other chores (such as painting miniatures, readying the gaming space, etc.)--hence players are in a prime position to "correct" their DM.
D20 is a player friendly, but not DM-friendly, game. IN MY OPINION.
So stop trying to change my mind by pointing out why I'm "wrong." I'm pretty sure I know what my own opinion is, and the fact that I'm entitled to it is beyond doubt.
'Kay, Sparky?