Wicht
Hero
"Taking '10' or '20'" is a crime against nature. 4E has it "right" if/when you auto succeed if your modifier is higher than the DC. Otherwise 'taking' a number is a cop-out for a DC system that's out-of-whack.
If something makes sense to automatically succeed, then no 'taking' of anything should be required, it just happens. Having to 'take' something is a ridiculous excess of rules in that case.
Urm, taking 10 is there to represent the fact that there are certain things you can succeed in automatically. Its the assumed norm for any attempt. Generally speaking, if the DC is low enough for the players to succeed by taking 10 and there is no rush, the DM should not be calling for rolls but should instead just assume the PC succeeds.
Taking 20 is a completely different animal. It assumes a concentrated, sustained effort that includes a few failures. You can't take 20 on any check where there is a penalty for failing (such as climbing) without suffering the failure.
I'm not sure how this is a crime against nature or an excess of rules. They seem fairly straightforward in both concept and execution, requiring only a couple of sentences of explanation.
Edit: I like rolling dice. But taking 10 is still a useful rule for speeding up game play.