[Arey85]

MR on walls and reg on ceiling. Use durock or some other type of cement board for tile backer.

 

[bjbatlanta]

Regular drywall is appropriate throughout as long as tile backer is used in the tiled areas, proper paint is used, and adequate ventilation is provided....

 

[Bud Cline]

...and MR is smarter.

 

[Maintenance 6]

MR board is cheap insurance for any area that will see higher than normal levels of moisture. Bathrooms, laundry rooms, even behind kitchen sinks and dishwahers. Proper ventilation is spotty in most cases. It may be perfect at the ceiling level. Effective half way down the walls and non-existent behind that sweaty toilet. Any accidental spills or overflows that reach the bottom of the wall board aren't going to wick up into MR board like they will regular drywall.