Some proposals simply say to paint the walls and ceiling and never specify the number of coats to be applied. If the colors are similar enough, it's possible to get away with one coat of paint and not discount your pricing. No matter how hard you try, tiny, pin-sized air holes will pop exposing the original walls. This may not bother you if you can't notice it, but principally speaking you should have paid your painter less for the work.
If you decide to paint multiple rooms in your home, choose colors that relate to one another without being completely the same -- unless uniformity is your goal, of course. Costs may vary based on differences in color, gloss and room size. However, each room will flow depending on the trim's color -- which should all be white or neutral -- so they look connected. A whole-house color scheme presents the same cost factors as painting multiple rooms individually: colors you choose, the gloss, the size of the rooms and time/labor. You can choose to use the same color throughout your entire home to save on money, or you can use a color scheme with the same gloss throughout, though this isn't recommended for selling purposes.
This was very helpful. I wonder if i would really follow through and check to see if my painter was cheating me. I used a painter I found on Angie's List. This was 5 years ago. He did a great job. I know he did patching only for about a day and a half. We decided on the kind of paint before he started. that is what he used. I don't know if I could stay on top of him and watch him open every can of paint.