One of the more common questions homeowners or DIY'ers have when it comes to painting is, "What finish should I use for my project?". The answer to this question really depends on what you're going to be painting. There are definitely better finishes to apply then others when it comes to certain things. Some finishes are more durable than others, while other cover better. Overall, it is important to know what finish will perform best for your particular project if you want lasting results. Hopefully this can give you some insight and a good idea of what direction you should go when choosing a finish for your next painting project.
Now a lot of painting professionals will also refer to paint finishes as "sheens". Sheen and Finish when it comes to paint is virtually the same thing to not get confused. Some may ask, "How many finishes can there actually be for paints?". You may be surprised. Now not all paint manufactures carry all of these finishes but for the most part you will find, Flat, Matte, Eggshell, Pearl, Satin, Semi-Gloss and High gloss. The least popular finishes in my experience from working in the Midwest to the Rocky Mountains of Colorado are Matte, Pearl and High gloss. These are also a little harder to find depending on what paint product you're using because, again not all manufacturers carry all of these finishes.
The least aggressive/shiny sheen is going to be Flat. Your most aggressive or shiny sheen is going to be high gloss, just as it sounds. Matte to Satin is everything in between. Also, it is good to know that the eggshell sheen is for interior paints ONLY. You won't typically find any exterior eggshell paint. The more shine or gloss it has to it the better it will be to clean or wipe but it will also attract more sunlight and UV rays over time. These more aggressive finishes will also bring out the profile more of the surface you are painting. This could be a good or bad thing. If you have imperfections, you would like to cover up then a less aggressive finish may be best. Good places for these more aggressive finishes are, bathrooms, doors, all trim, kitchen cabinets, high traffic or ware and tare areas plus anything else that may need a little more protection or need to get cleaned every now and again.
The less aggressive finishes are great for hiding imperfections on the surface profile, as well as tone down a room if its super bright. Flat finish in my experience is by far the most popular for ceilings. You can even find "extra flat" finish ceiling paint. These finishes will also not fade as fast. They are not however the best for cleaning, if you have to wipe marks off of a wall for example. Flat paint is also not ideal for bathrooms because of all the moisture that develops. It's not too forgivable after getting wet especially if its lower grade paint. You will also notice that the more aggressive the finish the more expensive the gallon of paint is. Flat paint is usually the cheapest and then High gloss the most expensive.
From what I have seen here in Colorado most people like to have Flat, eggshell or satin walls on the interior of their home. It seems eggshell might be the most popular. Satin is great for cleaning without being too aggressive of a finish. Semi-gloss and satin are typical for bathrooms because they clean great and can be wiped down without ruining the paint. These finishes are also most commonly applied to interior and exterior doors and trim. For the exterior of a home, you will see mostly flat finishes with satin or semi-gloss trim/accents. Certain styles of home like Victorians typically have Satin bodies and semi/high gloss trim. One thing to note is that Satin, semi-gloss and high gloss paints may also be referred to as "enamel". This basically just means it dries harder than typical finishes. It's very common for individuals to go up one finish level for their trim work to make it pop out more. Overall, this should give you basic knowledge on how to strategically choose your sheen/finish for you next paint project!