Consider Paint Types and Finishes
First you'll want to consider paint types. There are two -- oil or alkyd and latex. Latex paints are more popular because they dry quickly and clean up with soap and water. The next thing you'll want to consider is the finish.
Flat finishes have a soft, even appearance. They mark easily, however, so you'll want to use them in rooms that don't get a lot of traffic. Eggshell and satin finishes have a low luster and are washable, making them a great choice for rooms that get more use. Semi-gloss finishes are the most durable and are perfect for rooms that take a lot of abuse. Glossy finishes are shiny and are typically used on trim work.