Originally Posted by jkski
The the opinion seems to be that I should not bother painting the ceilings if they are a knock-down texture or am I incorrect in thinking this/wishful thinking?
If you prime before the texture goes on, you would be able to remove the texture later, with minimal "leftover" material. If you leave the drywall bare and the air's humidity reaches extreme levels, the drywall weakens, experiences dimensional changes and if it's like that Chinese crap that the US was glutted with, it promotes mold growth.
Personally, if I had a whole house to paint and it was larger (AND I had a lot of other stuff that needed my attention), I would spray it and be done. Having someone to follow with a roller makes it go a lot faster.