Yes, I agree totally. Some people prefer a texture, but 9 times out of 10 its to make the drywall work look acceptable.
On the subject of drywall, has anybody seen the new spray primer for new construction that supposedly is a high build type primer, achieving a level 5 finish? Can't recall the name right now, but my first impression was that it is just going to allow more shoddy work to be covered up.
We use Magnum's Level Coat with a good sprayer and put it on 13-15 mills thick. As I recall, paint dries at about 3 mills. Yes, don't tell the finishers or sanders you are using level coat or they might slack off. Level Coat's purpose is to level the porosity of the surface, not to fix a bad drywall job. We started using it for slick ceilings rather than skimming them with mud.
Level Coat has a good video at their site.