EzekielRaiden
Follower of the Way
A bad GM is one that engages in various harmful behaviors, such as: arbitrary and capricious decisions, bad-faith rules interpretation, crapping on others' preferences, refusal to engage in warranted and appropriate discussion (note: not the same as "always let everyone argue for as long as they want", because people love to twist this description into that), being manipulative or coercive, lying to the players about the nature of game they're going to be playing. That sort of thing. Truly bad GMs are rare.What criteria do you use to define a good, bad or mediocre GM's?
The vast majority of GMs are somewhere between "pretty decent" and "not very good", without being bad GMs. This area is hard to precisely quantify because someone could, for example, be absolutely amazing at fair and supportive adjudication, but be utter garbage at providing a scene/situation/context that is engaging to play in. Or they could be craptacular at running NPCs with reasonable and understandable behavior, but phenomenal at setting conceits and off-the-cuff homebrew. Or any of a number of other things.
A good GM obviously avoids all of the bad things that bad GMs do, but goes beyond that to doing the opposite or inverse: consistently fair or generous decisions, good-faith interpretation, going above and beyond to respect others' preferences, permitting warranted and appropriate discussion (while firmly but gently setting discussion aside when it truly isn't productive), being scrupulously honest and forthright when it comes to GM actions and justifications (read: NPCs can lie to PCs, that happens all the time; GMs, in their capacity as GMs, should never lie to their players). And, naturally, being no less than mediocre at the GM-skills stuff mentioned in the previous paragraph, but preferably better, and definitely quite good at at least a couple different GM skills.
I'd say the ratio of bad : mediocre : good is about 1 : 7 : 2. The clear majority of GMs are mediocre, and only a very small proportion are bad. But the bad ones are still more than common enough that most people will encounter one sooner or later.
Because, as I've said many times, it is the GM who is declaring they have power and authority. It is the GM who demands trust and respect.And why is it always on the shoulders of GM's? In my experience, I've seen more bad players than outright bad GM's
That specific thing--laying claim to authority and requiring trust--always means the person doing it should be held to a higher standard than those not doing that thing. That doesn't mean we have no standard at all for others, we most assuredly do. But anyone who claims the mantle of authority must be subject to greater scrutiny. It is the nature of the beast. We question the motives of our leadership far more than we question the motives of our neighbors, even though we spend far more time with the latter than the former!