delericho
Legend
IMO, there's a difference between a bad DM and one who is merely inexperienced. Most of the 'bad DM' behaviours I've seen are excusible in a DM who is still learning the ropes.
So, while I consider "killer DM", a "railroad DM", a "boring DM" or a "cheat DM" to be 'bad DM' behaviours, I'll only consider the DM himself bad if he is unwilling to listen to constructive criticism, and/or unwilling (or unable) to learn from his mistakes.
So, while I consider "killer DM", a "railroad DM", a "boring DM" or a "cheat DM" to be 'bad DM' behaviours, I'll only consider the DM himself bad if he is unwilling to listen to constructive criticism, and/or unwilling (or unable) to learn from his mistakes.