Edgar Ironpelt
Adventurer
I generally prefer symmetry between PCs and NPCs/monsters, so players rolling both to hit the monster and rolling to keep from being hit by the monster is an interesting idea, but not for me as a GM.
Now I seriously dislike "secret" rolls made by the GM for the player, so I'll try to eliminate those in with my house rules whenever possible. It's another reason for me to like roll-high systems and 'take 10' style rules. But if necessary I'll change the how-things-work, so that, e.g. a success with the prescribed roll to disbelieve will positively inform you "You succeeded, but the target isn't something that can be disbelieved."
Now I seriously dislike "secret" rolls made by the GM for the player, so I'll try to eliminate those in with my house rules whenever possible. It's another reason for me to like roll-high systems and 'take 10' style rules. But if necessary I'll change the how-things-work, so that, e.g. a success with the prescribed roll to disbelieve will positively inform you "You succeeded, but the target isn't something that can be disbelieved."