During the last session I played in, I was making skill rolls for my charatcer using skills he had no ranks in, and a base characteristic of 2. An average difficulty skill roll with a base stat of 2 is 2 green dice and 2 purple dice, assuming no modifiers, and that works out to be about a 50/50 chance for success, I think. I realized that it also meant there was a good chance I'd generate threat as well. Given the choice between rolling the dice and not rolling them, I decided it would be in my (and the party's) best interests not to roll the dice if that was an option.
That led to the inevitable question: when should it be an option to NOT roll a skill check? When can the GM say something like "Everyone make a Perception check," and a player can respond with "No thanks, I'll just voluntarily fail it."
In most other RPGs, it's no big deal if you fail a Perception check, since the result is a binary pass/fail and the worst consequence of failing is that you don't notice something. In EotE, however, generating Threat can mean that Bad Things Happen. In short, it's always potentially dangerous to roll the dice in this game.
I think in some cases, perhaps when there is risk involved, or the when the character in question cannot reasonably avoid the skill check, then the roll must be made, for better or worse. At other times, however, maybe it's okay to make a skill roll optional, or to just agree up front that some skill rolls (like Perception skill checks) do not carry an inherent risk, so any threat or advantage they generate will be ignored and only the success or failure of the roll will count.
Any thoughts or opinion? Have you guys ever run into situations where it was better to just opt out of a skill check and fail it without rolling?