pawsplay
Hero
My guidelines has always been, "You cannot change the nature of the thing." However lasting the effects, wish magic cannot exceed the limits of mortal magic. Being more versatile, it should be less, not more, powerful than other 9th level effects.
Conjuring a big pile of gold coins, sure. Conjuring a big pile of ever-replenishing gold, no. There is no kind of gold that behaves like that, and no spell of 8th level or less that has a similar effect.
Gaining a skill bonus, sure. Gaining a new class skill, iffy. Helping a character, on their own, learn a new ability, is probably reasonable, although as a DM it makes me a little nervous.
Gaining a new Feat, no. Permanently implanting a new ability falls outside my guideline. Likewise, changing a BAB or save bonus changes the nature of the class, and allows free increases without any further effort. Wishing for Wizard to have 1d10 Hit Dice is basically wishing there existed a class that had such hit dice, which falls under the category of changing the game world.
Conjuring a big pile of gold coins, sure. Conjuring a big pile of ever-replenishing gold, no. There is no kind of gold that behaves like that, and no spell of 8th level or less that has a similar effect.
Gaining a skill bonus, sure. Gaining a new class skill, iffy. Helping a character, on their own, learn a new ability, is probably reasonable, although as a DM it makes me a little nervous.
Gaining a new Feat, no. Permanently implanting a new ability falls outside my guideline. Likewise, changing a BAB or save bonus changes the nature of the class, and allows free increases without any further effort. Wishing for Wizard to have 1d10 Hit Dice is basically wishing there existed a class that had such hit dice, which falls under the category of changing the game world.