The choice of paint type and finish depends on the project's specific requirements. For most interior walls in residential settings, latex or acrylic paint is commonly used due to its easy application, quick drying time, and low odor. Satin, eggshell, or semi-gloss finishes are popular for interior walls as they balance durability and ease of cleaning. Satin and eggshell finishes work well for living areas and bedrooms, while semi-gloss is preferred for kitchens, bathrooms, and areas prone to moisture and stains.