Skills: In this area you will realize that watercolor painting does need you to be a master of the brush to produce good pieces of art. What is more any mistakes in watercolor paintings will take longer to correct as you need to wait till the paints dry before trying anything.
Room for error: A major disadvantage with using watercolors to create a masterpiece is that the likelihood of there being a mistake is more. Even an errant drop of water can affect the look of the painting, which means you need to be really proceed with the utmost care.
Ease of use: When it comes to being easy to use, watercolor definitely scores high as it is fairly easy to when compared with the other painting media. Which means that it makes it great for beginners who want to learn to paint and also are looking for the low cost option.
When it comes to passionate artists who are seeking the right medium to paint, it all boils down to what medium lets them express their artistic vision the best. For some it will always be oil paints in spite of it being more expensive and relatively tougher to use. For some artists it will be the acrylics which have the advantage of drying fast and also allow dilution with water. For others it will always be watercolors which helps them express their inner artistic visions the best.
However, in case you are just getting started in this path, it would be best if you started with watercolors as they are easy and inexpensive. However do dabble with the other media once you have the hang of painting just to get the feel of it before picking the one you want. You will find as you foray deeper into the world of painting that different types of paintings demand different media.