Alright, I'm answering multiple people here.
shilsen said:
For me, yes. I tell the DM when he makes a rules error that hurts the PCs and I tell the DM when he makes a rules error that helps the PCs. Similarly, as DM, I remind players when they forget things, whether they hurt the PCs or not. I'm not interested in a DM vs. players game, whichever side of the DM screen I'm on.
Rules error, absolutely. As a player, I always pointed out rules error. To the point that it has annoyed DMs before. And it sure has annoyed the more "competitive" players.
Tactical decisions? No.
To a degree, I qualify as "tactician" in that weird chart that tracks what kind of player you are. I -do- enjoy roleplaying, quite a bit. But when combat breaks out, I look for tactical advantages. I do -not- view the game as player against DM. I -do- understand that the DM is, in the end, an arbiter. At the same time, I'm a much better tactician than most DMs I've played under. Does that mean I should just take over combats entirely? I don't think so.
On the other hand, despite oryan77's beliefs, I mostly DM. Yet, it would be a major pain if the players always pointed out "tactical errors" to me. Why? Because not all of my NPCs/monsters always do the best thing. Dragons, liches, Powerful wizards? Well yes they do. But Golems, mindless undeads, goblins, dumb thugs, etc? Well no. They have their own mindset, their own way of acting in combat. It's not always the most tactically sound actions, but it's what they'd -do-. And a player constantly pointing out that fact would annoy me. To a degree, that is why I do not point out everything to the DMs either.
Rule errors? Sure. Tactical decisions? No.